Microsoft-Windows-Directory-Services-SAM

112 events across 1 channel

EventTitleChannelSample
12288SAM failed to write changes to the database.SystemN
12289SAM failed to restore the database to an earlier state.SystemN
12290SAM failed to update the SAM database.SystemN
12291SAM failed to start the TCP/IP or SPX/IPX listening threadSystemN
12292There are two or more objects that have the same account name attribute in the …SystemN
12293There are two or more objects that have the same SID attribute in the SAM …SystemN
12294The SAM database was unable to lockout the account of UserName due to a resource …SystemN
12295The SAM database attempted to delete the file FilePath as it contains account …SystemN
12296The SAM database attempted to clear the directory DirectoryPath in order to …SystemN
12297ComputerName is now the primary domain controller for the domain.SystemN
12298The account ComputerName cannot be converted to be a domain controller account …SystemN
12299The attempt to check whether group caching has been enabled in the Security …SystemN
12300The group caching option in the Security Accounts Manager has now been properly …SystemN
12301The group caching option in the Security Accounts Manager has now been properly …SystemN
12302The SecurityPackage package failed to update additional credentials for user …SystemN
12303There are two or more well known objects that have the same SID attribute in the …SystemN
12304There are two or more objects that have the same account name attribute in the …SystemN
12305An error occurred while creating new default accounts for this domain.SystemN
16384The account AccountName could not be upgraded since there is an account with an …SystemN
16385An error occurred upgrading user UserName.SystemN
16386An error occurred trying to read a user object from the old database.SystemN
16387An error occurred upgrading alias GroupName.SystemN
16388An error occurred trying to read an alias object from the old database.SystemN
16389An error occurred upgrading group GroupName.SystemN
16390An error occurred trying to read a group object from the old database.SystemN
16391An error occurred trying to add account AccountDistinguishedName to alias …SystemN
16392The account with the sid AccountSID could not be added to group …SystemN
16393An error occurred trying to add account AccountDistinguishedName to group …SystemN
16394The account with the rid AccountRID could not be added to group GroupName.SystemN
16395A fatal error occurred trying to transfer the SAM account database into the …SystemN
16397Setting the administrator's password to the string you specified failed.SystemN
16398An error occurred trying to upgrade a SAM user's User_Parameters attribute.SystemN
16399An error occured trying to set User Parameters attribute for this user This …SystemN
16400An error occured trying to upgrade the following SAM User Object - UserName.SystemN
16401An error occurred when trying to add the account Name to the group AccountName.SystemY
16402An error occurred when trying to add the account AccountName to the group …SystemN
16403The error "AccountName" occurred when trying to create the well known account …SystemY
16404The Security Accounts Manager failed to add the Enterprise Admins group to the …SystemN
16405During the installation of the Directory Service, this server's machine account …SystemN
16406The Security Account Database detected that the well known account UserName does …SystemN
16407The Security Account Database detected that the well known group or local group …SystemN
16408Domain operation mode has been changed to Native Mode.SystemN
16409Active Directory Domain Services failed to add a security principal to well …SystemN
16410Active Directory Domain Services failed to add all of the new security …SystemN
16411Active Directory Domain Services failed to rename a security principal in well …SystemN
16412Active Directory Domain Services failed to rename some of the security …SystemN
16413An error occurred when trying to remove the account Name from the group …SystemY
16640The account-identifier allocator finished initializing.SystemN
16641The account-identifier pool for this domain controller could not be updated.SystemN
16642The account-identifier allocator was unable to assign a new identifier.SystemN
16643An initial account-identifier pool has not yet been allocated to this domain …SystemN
16644The maximum domain account identifier value has been reached.SystemN
16645The maximum account identifier allocated to this domain controller has been …SystemN
16646The computed account identifier is invalid because it is out of the range of the …SystemN
16647The domain controller is starting a request for a new account-identifier pool.SystemY
16648The request for a new account-identifier pool has completed successfully.SystemY
16649The account-identifier-manager object creation completed.SystemN
16650The account-identifier allocator failed to initialize properly.SystemN
16651The request for a new account-identifier pool failed.SystemN
16652The domain controller is booting to directory services restore mode.SystemN
16653A pool size for account-identifiers (RIDs) that was configured by an …SystemN
16654A pool of account-identifiers (RIDs) has been invalidated.SystemY
16655The global maximum for account-identifiers (RIDs) has been increased to …SystemN
16656Action required!SystemN
16657Action required!SystemN
16658This event is a periodic update on the remaining total quantity of available …SystemN
16935Failed to secure the machine account ComputerName.SystemN
16936Failed to secure the machine account ComputerName.SystemN
16937Secured the machine account Name.SystemY
16944The certificate that is used for authentication does not have an issuance policy …SystemN
16945The certificate issuance policy that is represented by OID OID Object DN does …SystemN
16946Multiple certificate issuance policy descriptors were found in the Active …SystemN
16947The certificate issuance policy descriptor OID Object DN is linked through its …SystemN
16948The requested modification for group Group DN could not be performed.SystemN
16949The certificate issuance policy descriptor OID Name cannot be linked to group …SystemN
16950The following invalid claims issued to user User have been dropped: …SystemN
16951Claims issued to user User could not be validated and have been dropped.SystemN
16952Claims issued to user User could not be validated and have been dropped.SystemN
16953The password notification DLL NotificationPackage: failed to load with error …SystemN
16960SAM was configured to not listen on the TCP protocol.SystemN
16961Legacy password validation mode has been enabled on this machine.SystemN
16962Remote calls to the SAM database are being restricted using the default security …SystemY
16963Remote calls to the SAM database are being restricted using the configured …SystemN
16964The registry security descriptor is malformed: MalformedSDString.SystemN
16965A remote call to the SAM database has been denied.SystemN
16966Audit only mode is now enabled for remote calls to the SAM database.SystemN
16967Audit only mode is now disabled for remote calls to the SAM database.SystemN
16968Audit only mode is currently enabled for remote calls to the SAM database.SystemN
16969Suppressed Message Count: remote calls to the SAM database have been denied in …SystemY
16976An error occurred while configuring one or more well-known accounts for this …SystemN
16977The domain is configured with the following minimum password length-related …SystemY
16978The following account has been configured with a password whose length is …SystemN
16979The domain is incorrectly configured with a MinimumPasswordLength setting that …SystemN
16980The security account manager has detected the use of a ROCA-vulnerable Windows …SystemN
16981The security account manager has detected and blocked the use of a …SystemN
16982The security account manager is now logging verbose events for remote clients …SystemN
16983The security account manager is now logging periodic summary events for remote …SystemY
16984The security account manager detected Number of RPC methods: legacy password …SystemN
16985The security account manager detected the use of a legacy password change or set …SystemN
16986The security account manager has detected one or more duplicated names for a …SystemN
16987The security account manager has detected one or more duplicated names for a …SystemN
16988The security account manager encountered one or more fatal errors on startup …SystemN
16989The security account manager encountered one or more non-fatal errors on …SystemN
16990The security account manager blocked a non-administrator from creating an Active …SystemN
16991The security account manager blocked a non-administrator from creating or …SystemN
16992The security account manager is now configuring the local password and lockout …SystemN
16993The security account manager successfully initialized the Local Administrator …SystemY
16994The security account manager failed to initialize the Local Administrator …SystemN
16995The security account manager is using the specified security descriptor for …SystemN
16996The security descriptor that contains the computer account re-use allow list …SystemN
16997The security account manager found a computer account that appears to be …SystemN
16998The security account manager rejected a client request to re-use a computer …SystemN

Event ID 12288: SAM failed to write changes to the database.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

SAM failed to write changes to the database. This is most likely due to a memory or disk-space shortage. The SAM database will be restored to an earlier state. Recent changes will be lost. Check the disk-space available and maximum pagefile size setting.

Message #

SAM failed to write changes to the database. This is most likely due to a memory or disk-space shortage. The SAM database will be restored to an earlier state. Recent changes will be lost. Check the disk-space available and maximum pagefile size setting.

Fields #

NameDescription
__binLength UInt32
ErrorCode Binary

Event ID 12289: SAM failed to restore the database to an earlier state.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

SAM failed to restore the database to an earlier state. SAM has shutdown. You must reboot the machine to re-enable SAM.

Message #

SAM failed to restore the database to an earlier state. SAM has shutdown. You must reboot the machine to re-enable SAM.

Fields #

NameDescription
__binLength UInt32
ErrorCode Binary

Event ID 12290: SAM failed to update the SAM database.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

SAM failed to update the SAM database. It will try again next time you reboot the machine.

Message #

SAM failed to update the SAM database. It will try again next time you reboot the machine.

Event ID 12291: SAM failed to start the TCP/IP or SPX/IPX listening thread

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

SAM failed to start the TCP/IP or SPX/IPX listening thread.

Message #

SAM failed to start the TCP/IP or SPX/IPX listening thread

Fields #

NameDescription
__binLength UInt32
LogStatus Binary

Event ID 12292: There are two or more objects that have the same account name attribute in the SAM database.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Message #

There are two or more objects that have the same account name attribute in the SAM database. The Distinguished Name of the account is {AccountDistinguishedName}. Please contact your system administrator to have all duplicate accounts deleted; but ensure that the original account remains. For computer accounts; the newest account should be retained. In all the other cases; the older account should be kept.

Fields #

NameDescription
AccountDistinguishedName

Event ID 12293: There are two or more objects that have the same SID attribute in the SAM database.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

There are two or more objects that have the same SID attribute in the SAM database. The Distinguished Name of the account is AccountDistinguishedName. All duplicate accounts have been deleted. Check the event log for additional duplicates.

Message #

There are two or more objects that have the same SID attribute in the SAM database. The Distinguished Name of the account is %1. All duplicate accounts have been deleted. Check the event log for additional duplicates.

Fields #

NameDescription
AccountDistinguishedName UnicodeString

Event ID 12294: The SAM database was unable to lockout the account of UserName due to a resource error, such as a hard disk write failure.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The SAM database was unable to lockout the account of UserName due to a resource error, such as a hard disk write failure (the specific error code is in the error data) . Accounts are locked after a certain number of bad passwords are provided so please consider resetting the password of the account mentioned above.

Message #

The SAM database was unable to lockout the account of %1 due to a resource error, such as a hard disk write failure (the specific error code is in the error data) . Accounts are locked after a certain number of bad passwords are provided so please consider resetting the password of the account mentioned above.

Fields #

NameDescription
UserName UnicodeString
__binLength UInt32
ErrorCode Binary

Event ID 12295: The SAM database attempted to delete the file FilePath as it contains account information that is no longer used.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The SAM database attempted to delete the file FilePath as it contains account information that is no longer used. The error is in the record data. Please have an administrator delete this file.

Message #

The SAM database attempted to delete the file %1 as it contains account information that is no longer used.  The error is in the record data. Please have an administrator delete this file.

Fields #

NameDescription
FilePath UnicodeString
__binLength UInt32
WinError Binary

Event ID 12296: The SAM database attempted to clear the directory DirectoryPath in order to remove files that were once used by the Directory Service.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The SAM database attempted to clear the directory DirectoryPath in order to remove files that were once used by the Directory Service. The error is in record data. Please have an admin delete these files.

Message #

The SAM database attempted to clear the directory %1 in order to remove files that were once used by the Directory Service. The error is in record data. Please have an admin delete these files.

Fields #

NameDescription
DirectoryPath UnicodeString
__binLength UInt32
WinError Binary

Event ID 12297: ComputerName is now the primary domain controller for the domain.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

ComputerName is now the primary domain controller for the domain.

Message #

%1 is now the primary domain controller for the domain.

Fields #

NameDescription
ComputerName UnicodeString

Event ID 12298: The account ComputerName cannot be converted to be a domain controller account as its object class attribute in the directory is not computer or is not deriv...

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The account ComputerName cannot be converted to be a domain controller account as its object class attribute in the directory is not computer or is not derived from computer. If this is caused by an attempt to install a pre Windows 2000 domain controller in a Windows 2000 domain or later, then you should pre-create the account for the domain controller with the correct object class.

Message #

The account %1 cannot be converted to be a domain controller account as its object class attribute in the directory is not computer or is not derived from computer. If this is caused by an attempt to install a pre Windows 2000 domain controller in a Windows 2000 domain or later, then you should pre-create the account for the domain controller with the correct object class.

Fields #

NameDescription
ComputerName UnicodeString

Event ID 12299: The attempt to check whether group caching has been enabled in the Security Accounts Manager has failed, most likely due to lack of resources.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The attempt to check whether group caching has been enabled in the Security Accounts Manager has failed, most likely due to lack of resources. This task has been rescheduled to run in one minute.

Message #

The attempt to check whether group caching has been enabled in the Security Accounts Manager has failed, most likely due to lack of resources. This task has been rescheduled to run in one minute.

Fields #

NameDescription
__binLength UInt32
ErrorCode Binary

Event ID 12300: The group caching option in the Security Accounts Manager has now been properly updated.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The group caching option in the Security Accounts Manager has now been properly updated. Group caching is enabled.

Message #

The group caching option in the Security Accounts Manager has now been properly updated.  Group caching is enabled.

Event ID 12301: The group caching option in the Security Accounts Manager has now been properly updated.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The group caching option in the Security Accounts Manager has now been properly updated. Group caching is disabled.

Message #

The group caching option in the Security Accounts Manager has now been properly updated. Group caching is disabled.

Event ID 12302: The SecurityPackage package failed to update additional credentials for user UserName.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The SecurityPackage package failed to update additional credentials for user UserName. The error code is in the data of the event log message.

Message #

The %1 package failed to update additional credentials for user %2.  The error code is in the data of the event log message.

Fields #

NameDescription
SecurityPackage UnicodeString
UserName UnicodeString
__binLength UInt32
ErrorCode Binary

Event ID 12303: There are two or more well known objects that have the same SID attribute in the SAM database.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

There are two or more well known objects that have the same SID attribute in the SAM database. The Distinguished Name of the duplicate account is AccountDistinguishedName. The newest account will be kept, all older duplicate accounts have been deleted. Check the event log for additional duplicates.

Message #

There are two or more well known objects that have the same SID attribute in the SAM database. The Distinguished Name of the duplicate account is %1. The newest account will be kept, all older duplicate accounts have been deleted. Check the event log for additional duplicates.

Fields #

NameDescription
AccountDistinguishedName UnicodeString

Event ID 12304: There are two or more objects that have the same account name attribute in the SAM database.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

There are two or more objects that have the same account name attribute in the SAM database. The system has automatically renamed object AccountDistinguishedName to a system assigned account name SystemAssignedAccountName.

Message #

There are two or more objects that have the same account name attribute in the SAM database. The system has automatically renamed object %1 to a system assigned account name %2.

Fields #

NameDescription
AccountDistinguishedName UnicodeString
SystemAssignedAccountName UnicodeString

Event ID 12305: An error occurred while creating new default accounts for this domain.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

An error occurred while creating new default accounts for this domain. This maybe due to a transient error condition. The task will retry periodically until success and will log this message again in a week if the problem persists.

Message #

An error occurred while creating new default accounts for this domain.  This maybe due to a transient error condition. The task will retry periodically until success and will log this message again in a week if the problem persists.

Fields #

NameDescription
__binLength UInt32
ErrorCode Binary

Event ID 16384: The account AccountName could not be upgraded since there is an account with an equivalent name.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The account AccountName could not be upgraded since there is an account with an equivalent name.

Message #

The account %1 could not be upgraded since there is an account with an equivalent name.

Fields #

NameDescription
AccountName UnicodeString
__binLength UInt32
ErrorCode Binary

Event ID 16385: An error occurred upgrading user UserName.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

An error occurred upgrading user UserName. This account will have to be added manually upon reboot.

Message #

An error occurred upgrading user %1.  This account will have to be added manually upon reboot.

Fields #

NameDescription
UserName UnicodeString
__binLength UInt32
ErrorCode Binary

Event ID 16386: An error occurred trying to read a user object from the old database.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

An error occurred trying to read a user object from the old database.

Message #

An error occurred trying to read a user object from the old database.

Fields #

NameDescription
__binLength UInt32
ErrorCode Binary

Event ID 16387: An error occurred upgrading alias GroupName.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

An error occurred upgrading alias GroupName. This account will have to be added manually upon reboot.

Message #

An error occurred upgrading alias %1. This account will have to be added manually upon reboot.

Fields #

NameDescription
GroupName UnicodeString
__binLength UInt32
ErrorCode Binary

Event ID 16388: An error occurred trying to read an alias object from the old database.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

An error occurred trying to read an alias object from the old database.

Message #

An error occurred trying to read an alias object from the old database.

Fields #

NameDescription
__binLength UInt32
ErrorCode Binary

Event ID 16389: An error occurred upgrading group GroupName.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

An error occurred upgrading group GroupName. This account will have to be added manually upon reboot.

Message #

An error occurred upgrading group %1. This account will have to be added manually upon reboot.

Fields #

NameDescription
GroupName UnicodeString
__binLength UInt32
ErrorCode Binary

Event ID 16390: An error occurred trying to read a group object from the old database.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

An error occurred trying to read a group object from the old database.

Message #

An error occurred trying to read a group object from the old database.

Fields #

NameDescription
__binLength UInt32
ErrorCode Binary

Event ID 16391: An error occurred trying to add account AccountDistinguishedName to alias GroupName.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

An error occurred trying to add account AccountDistinguishedName to alias GroupName. This account will have to be added manually upon reboot.

Message #

An error occurred trying to add account %1 to alias %2.  This account will have to be added manually upon reboot.

Fields #

NameDescription
AccountDistinguishedName UnicodeString
GroupName UnicodeString
__binLength UInt32
ErrorCode Binary

Event ID 16392: The account with the sid AccountSID could not be added to group AccountDistinguishedName.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The account with the sid AccountSID could not be added to group AccountDistinguishedName.

Message #

The account with the sid %1 could not be added to group %2.

Fields #

NameDescription
AccountSID UnicodeString
AccountDistinguishedName UnicodeString
__binLength UInt32
ErrorCode Binary

Event ID 16393: An error occurred trying to add account AccountDistinguishedName to group GroupName.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

An error occurred trying to add account AccountDistinguishedName to group GroupName. This account will have to be added manually upon reboot.

Message #

An error occurred trying to add account %1 to group %2.  This account will have to be added manually upon reboot.

Fields #

NameDescription
AccountDistinguishedName UnicodeString
GroupName UnicodeString
__binLength UInt32
ErrorCode Binary

Event ID 16394: The account with the rid AccountRID could not be added to group GroupName.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The account with the rid AccountRID could not be added to group GroupName.

Message #

The account with the rid %1 could not be added to group %2.

Fields #

NameDescription
AccountRID UInt32
GroupName UnicodeString
__binLength UInt32
ErrorCode Binary

Event ID 16395: A fatal error occurred trying to transfer the SAM account database into the directory service.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

A fatal error occurred trying to transfer the SAM account database into the directory service. A possible reason is the SAM account database is corrupt.

Message #

A fatal error occurred trying to transfer the SAM account database into the directory service. A possible reason is the SAM account database is corrupt.

Fields #

NameDescription
__binLength UInt32
ErrorCode Binary

Event ID 16397: Setting the administrator's password to the string you specified failed.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

Setting the administrator's password to the string you specified failed. Upon reboot the password will be blank; please reset once logged on.

Message #

Setting the administrator's password to the string you specified failed. Upon reboot the password will be blank; please reset once logged on.

Event ID 16398: An error occurred trying to upgrade a SAM user's User_Parameters attribute.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

An error occurred trying to upgrade a SAM user's User_Parameters attribute. The following Notification Package DLL might be the possible offender: SecurityPackage. Check the record data of this event for the NT error code.

Message #

An error occurred trying to upgrade a SAM user's User_Parameters attribute. The following Notification Package DLL might be the possible offender: %1. Check the record data of this event for the NT error code.

Fields #

NameDescription
SecurityPackage UnicodeString
__binLength UInt32
ErrorCode Binary

Event ID 16399: An error occured trying to set User Parameters attribute for this user This operation is failed.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

An error occured trying to set User Parameters attribute for this user This operation is failed. Check the record data of this event for the NT error code.

Message #

An error occured trying to set User Parameters attribute for this user This operation is failed. Check the record data of this event for the NT error code.

Fields #

NameDescription
__binLength UInt32
ErrorCode Binary

Event ID 16400: An error occured trying to upgrade the following SAM User Object - UserName.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

An error occured trying to upgrade the following SAM User Object - UserName. We will try to continue upgrading this user. But it might contain inconsistent data. Check the record data of this event for the NT error code.

Message #

An error occured trying to upgrade the following SAM User Object - %1. We will try to continue upgrading this user. But it might contain inconsistent data. Check the record data of this event for the NT error code.

Fields #

NameDescription
UserName UnicodeString
__binLength UInt32
ErrorCode Binary

Event ID 16401: An error occurred when trying to add the account Name to the group AccountName.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System
Level
Informational

Description

An error occurred when trying to add the account Name to the group AccountName. The problem, "GroupName", occurred when trying to open the group. Please add the account manually.

Message #

An error occurred when trying to add the account %1 to the group %2. The problem, "%3", occurred when trying to open the group. Please add the account manually.

Fields #

NameDescription
AccountName UnicodeString
GroupName UnicodeString
ErrorMessage UnicodeString
__binLength
ErrorCode

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-Directory-Services-SAM",
    "guid": "0D4FDC09-8C27-494A-BDA0-505E4FD8ADAE",
    "event_source_name": "",
    "event_id": 16401,
    "version": 0,
    "level": 4,
    "task": 0,
    "opcode": 0,
    "keywords": 9223372036854775808,
    "time_created": "2022-04-07T08:14:31.641248+00:00",
    "event_record_id": 628,
    "correlation": {},
    "execution": {
      "process_id": 648,
      "thread_id": 652
    },
    "channel": "System",
    "computer": "WIN-FPV0DSIC9O6.lab.local",
    "security": {
      "user_id": "S-1-5-18"
    }
  },
  "event_data": {
    "Name": "SAMMSG_MEMBERSHIP_SETUP_ERROR_NO_GROUP",
    "AccountName": "INTERNET USER",
    "GroupName": "IIS_IUSRS",
    "ErrorMessage": "The specified local group does not exist.\r\n",
    "Binary": "60050000"
  },
  "message": ""
}

References #

Event ID 16402: An error occurred when trying to add the account AccountName to the group GroupName.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

An error occurred when trying to add the account AccountName to the group GroupName. The problem, "ErrorMessage", occurred when trying to add the account to the group. Please add the account manually.

Message #

An error occurred when trying to add the account %1 to the group %2. The problem, "%3", occurred when trying to add the account to the group.  Please add the account manually.

Fields #

NameDescription
AccountName UnicodeString
GroupName UnicodeString
ErrorMessage UnicodeString
__binLength UInt32
ErrorCode Binary

Event ID 16403: The error "AccountName" occurred when trying to create the well known account Name.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System
Level
Informational

Description

The error "AccountName" occurred when trying to create the well known account Name. Please contact PSS to recover.

Message #

The error "%2" occurred when trying to create the well known account %1. Please contact PSS to recover.

Fields #

NameDescription
AccountName UnicodeString
ErrorMessage UnicodeString
__binLength
ErrorCode

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-Directory-Services-SAM",
    "guid": "0D4FDC09-8C27-494A-BDA0-505E4FD8ADAE",
    "event_source_name": "",
    "event_id": 16403,
    "version": 0,
    "level": 4,
    "task": 0,
    "opcode": 0,
    "keywords": 9223372036854775808,
    "time_created": "2022-04-07T08:14:31.644632+00:00",
    "event_record_id": 638,
    "correlation": {},
    "execution": {
      "process_id": 648,
      "thread_id": 652
    },
    "channel": "System",
    "computer": "WIN-FPV0DSIC9O6.lab.local",
    "security": {
      "user_id": "S-1-5-18"
    }
  },
  "event_data": {
    "Name": "SAMMSG_USER_SETUP_ERROR",
    "AccountName": "WDAGUtilityAccount",
    "ErrorMessage": "The specified network password is not correct.\r\n",
    "Binary": "56000000"
  },
  "message": ""
}

References #

Event ID 16404: The Security Accounts Manager failed to add the Enterprise Admins group to the local Administrators alias.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The Security Accounts Manager failed to add the Enterprise Admins group to the local Administrators alias. To ensure proper functioning of the domain; please add the account manually.

Message #

The Security Accounts Manager failed to add the Enterprise Admins group to the local Administrators alias. To ensure proper functioning of the domain; please add the account manually.

Event ID 16405: During the installation of the Directory Service, this server's machine account was deleted hence preventing this Domain Controller from starting up.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

During the installation of the Directory Service, this server's machine account was deleted hence preventing this Domain Controller from starting up.

Message #

During the installation of the Directory Service, this server's machine account was deleted hence preventing this Domain Controller from starting up.

Fields #

NameDescription
__binLength UInt32
ErrorCode Binary

Event ID 16406: The Security Account Database detected that the well known account UserName does not exist.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The Security Account Database detected that the well known account UserName does not exist. The account has been recreated. Please reset the password for the account.

Message #

The Security Account Database detected that the well known account %1 does not exist. The account has been recreated.  Please reset the password for the account.

Fields #

NameDescription
UserName UnicodeString
__binLength UInt32
ErrorCode Binary

Event ID 16407: The Security Account Database detected that the well known group or local group GroupName does not exist.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The Security Account Database detected that the well known group or local group GroupName does not exist. The group has been recreated.

Message #

The Security Account Database detected that the well known group or local group %1 does not exist. The group has been recreated.

Fields #

NameDescription
GroupName UnicodeString
__binLength UInt32
ErrorCode Binary

Event ID 16408: Domain operation mode has been changed to Native Mode.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

Domain operation mode has been changed to Native Mode. The change cannot be reversed.

Message #

Domain operation mode has been changed to Native Mode. The change cannot be reversed.

Event ID 16409: Active Directory Domain Services failed to add a security principal to well known security principals container.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

Active Directory Domain Services failed to add a security principal to well known security principals container. Please have an administrator add this security principal if needed. Security principal name: AccountName

Message #

Active Directory Domain Services failed to add a security principal to well known security principals container. Please have an administrator add this security principal if needed. Security principal name: %1

Fields #

NameDescription
AccountName UnicodeString
__binLength UInt32
ErrorCode Binary

Event ID 16410: Active Directory Domain Services failed to add all of the new security principals to well known security principals container.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

Active Directory Domain Services failed to add all of the new security principals to well known security principals container. Please have an administrator add these security principals if needed.

Message #

Active Directory Domain Services failed to add all of the new security principals to well known security principals container. Please have an administrator add these security principals if needed.

Fields #

NameDescription
__binLength UInt32
ErrorCode Binary

Event ID 16411: Active Directory Domain Services failed to rename a security principal in well known security principals container.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

Active Directory Domain Services failed to rename a security principal in well known security principals container. Please have an administrator rename this security principal if needed. Security principal name: AccountName

Message #

Active Directory Domain Services failed to rename a security principal in well known security principals container. Please have an administrator rename this security principal if needed. Security principal name: %1

Fields #

NameDescription
AccountName UnicodeString
__binLength UInt32
ErrorCode Binary

Event ID 16412: Active Directory Domain Services failed to rename some of the security principals in well known security principals container.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

Active Directory Domain Services failed to rename some of the security principals in well known security principals container. Please have an administrator rename these security principals if needed.

Message #

Active Directory Domain Services failed to rename some of the security principals in well known security principals container. Please have an administrator rename these security principals if needed.

Fields #

NameDescription
__binLength UInt32
ErrorCode Binary

Event ID 16413: An error occurred when trying to remove the account Name from the group AccountName.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System
Level
Informational

Description

An error occurred when trying to remove the account Name from the group AccountName. The problem, "GroupName", occurred when trying to remove the account from the group. Please remove the member manually.

Message #

An error occurred when trying to remove the account %1 from the group %2. The problem, "%3", occurred when trying to remove the account from the group.  Please remove the member manually.

Fields #

NameDescription
AccountName UnicodeString
GroupName UnicodeString
ErrorString UnicodeString
__binLength
BinaryData

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-Directory-Services-SAM",
    "guid": "0D4FDC09-8C27-494A-BDA0-505E4FD8ADAE",
    "event_source_name": "",
    "event_id": 16413,
    "version": 0,
    "level": 4,
    "task": 0,
    "opcode": 0,
    "keywords": 9223372036854775808,
    "time_created": "2022-04-07T08:14:31.656794+00:00",
    "event_record_id": 639,
    "correlation": {},
    "execution": {
      "process_id": 648,
      "thread_id": 652
    },
    "channel": "System",
    "computer": "WIN-FPV0DSIC9O6.lab.local",
    "security": {
      "user_id": "S-1-5-18"
    }
  },
  "event_data": {
    "Name": "SAMMSG_MEMBERSHIP_REMOVAL_SETUP_ERROR",
    "AccountName": "Network Service",
    "GroupName": "Performance Log Users",
    "ErrorString": "The system cannot find the file specified.\r\n",
    "Binary": "02000000"
  },
  "message": ""
}

References #

Event ID 16640: The account-identifier allocator finished initializing.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Message #

The account-identifier allocator finished initializing. The allocator was initialized with the following identifier values: {MinimumDomainRID} {MaximumDomainRID} {RIDPoolSize} {MinimumAvailableRID} {MaximumAvailableRID} {MinimumAllocatedRID} {MaximumAllocatedRID} {CurrentRIDValue}. Check the record data of this event for the initialization status. Zero indicates successful initialization; otherwise the record data contains the NT error code.

Fields #

NameDescription
MinimumDomainRID
MaximumDomainRID
RIDPoolSize
MinimumAvailableRID
MaximumAvailableRID
MinimumAllocatedRID
MaximumAllocatedRID
CurrentRIDValue

Event ID 16641: The account-identifier pool for this domain controller could not be updated.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Message #

The account-identifier pool for this domain controller could not be updated. A possible reason for this is that the domain controller may be too busy with other update operations. Subsequent account creations will attempt to update the ID pool until successful.

Event ID 16642: The account-identifier allocator was unable to assign a new identifier.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The account-identifier allocator was unable to assign a new identifier. The identifier pool for this domain controller may have been depleted. If this problem persists, restart the domain controller and view the initialization status of the allocator in the event log.

Message #

The account-identifier allocator was unable to assign a new identifier. The identifier pool for this domain controller may have been depleted. If this problem persists, restart the domain controller and view the initialization status of the allocator in the event log.

Fields #

NameDescription
__binLength UInt32
ErrorCode Binary

Event ID 16643: An initial account-identifier pool has not yet been allocated to this domain controller.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

An initial account-identifier pool has not yet been allocated to this domain controller. A possible reason for this is that the domain controller has been unable to contact the master domain controller, possibly due to connectivity or network problems. Account creation will fail on this domain controller until the pool is obtained.

Message #

An initial account-identifier pool has not yet been allocated to this domain controller. A possible reason for this is that the domain controller has been unable to contact the master domain controller, possibly due to connectivity or network problems. Account creation will fail on this domain controller until the pool is obtained.

Fields #

NameDescription
__binLength UInt32
ErrorCode Binary

Event ID 16644: The maximum domain account identifier value has been reached.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The maximum domain account identifier value has been reached. No further account-identifier pools can be allocated to domain controllers in this domain.

Message #

The maximum domain account identifier value has been reached. No further account-identifier pools can be allocated to domain controllers in this domain.

Fields #

NameDescription
__binLength UInt32
ErrorCode Binary

Event ID 16645: The maximum account identifier allocated to this domain controller has been assigned.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The maximum account identifier allocated to this domain controller has been assigned. The domain controller has failed to obtain a new identifier pool. A possible reason for this is that the domain controller has been unable to contact the master domain controller. Account creation on this controller will fail until a new pool has been allocated. There may be network or connectivity problems in the domain, or the master domain controller may be offline or missing from the domain. Verify that the master domain controller is running and connected to the domain.

Message #

The maximum account identifier allocated to this domain controller has been assigned. The domain controller has failed to obtain a new identifier pool. A possible reason for this is that the domain controller has been unable to contact the master domain controller. Account creation on this controller will fail until a new pool has been allocated. There may be network or connectivity problems in the domain, or the master domain controller may be offline or missing from the domain. Verify that the master domain controller is running and connected to the domain.

Fields #

NameDescription
__binLength UInt32
ErrorCode Binary

Event ID 16646: The computed account identifier is invalid because it is out of the range of the current account-identifier pool belonging to this domain controller.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The computed account identifier is invalid because it is out of the range of the current account-identifier pool belonging to this domain controller. The computed RID value is ComputedRIDValue. Try invalidating the account identifier pool owned by this domain controller. This will make the domain controller acquire a fresh account identifier pool.

Message #

The computed account identifier is invalid because it is out of the range of the current account-identifier pool belonging to this domain controller. The computed RID value is %1. Try invalidating the account identifier pool owned by this domain controller. This will make the domain controller acquire a fresh account identifier pool.

Fields #

NameDescription
ComputedRIDValue UInt32
__binLength UInt32
ErrorCode Binary

Event ID 16647: The domain controller is starting a request for a new account-identifier pool.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System
Level
Informational

Description

The domain controller is starting a request for a new account-identifier pool.

Message #

The domain controller is starting a request for a new account-identifier pool.

Fields #

NameDescription
Name

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-Directory-Services-SAM",
    "guid": "{0D4FDC09-8C27-494A-BDA0-505E4FD8ADAE}",
    "event_source_name": "",
    "event_id": 16647,
    "version": 0,
    "level": 4,
    "task": 0,
    "opcode": 0,
    "keywords": -9223372036854775808,
    "time_created": "2026-05-29T16:33:32.5431831+00:00",
    "event_record_id": 6797,
    "correlation": {},
    "execution": {
      "process_id": 812,
      "thread_id": 1012
    },
    "channel": "System",
    "computer": "telemetry-DC-a.cell-a.ludus.domain",
    "security": {
      "user_id": "S-1-5-18"
    }
  },
  "event_data": {},
  "message": "The domain controller is starting a request for a new account-identifier pool."
}

Event ID 16648: The request for a new account-identifier pool has completed successfully.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System
Level
Informational

Description

The request for a new account-identifier pool has completed successfully.

Message #

The request for a new account-identifier pool has completed successfully.

Fields #

NameDescription
__binLength
ErrorCode

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-Directory-Services-SAM",
    "guid": "{0D4FDC09-8C27-494A-BDA0-505E4FD8ADAE}",
    "event_source_name": "",
    "event_id": 16648,
    "version": 0,
    "level": 4,
    "task": 0,
    "opcode": 0,
    "keywords": -9223372036854775808,
    "time_created": "2026-05-29T16:33:33.6600056+00:00",
    "event_record_id": 6798,
    "correlation": {},
    "execution": {
      "process_id": 812,
      "thread_id": 1012
    },
    "channel": "System",
    "computer": "telemetry-DC-a.cell-a.ludus.domain",
    "security": {
      "user_id": "S-1-5-18"
    }
  },
  "event_data": {},
  "message": "The request for a new account-identifier pool has completed successfully."
}

Event ID 16649: The account-identifier-manager object creation completed.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The account-identifier-manager object creation completed. If the record data for this event has the value zero, the manager object was created. Otherwise, the record data will contain the NT error code indicating the failure. The failure to create the object may be due to low system resources, insufficient memory, or disk space.

Message #

The account-identifier-manager object creation completed. If the record data for this event has the value zero, the manager object was created. Otherwise, the record data will contain the NT error code indicating the failure. The failure to create the object may be due to low system resources, insufficient memory, or disk space.

Fields #

NameDescription
__binLength UInt32
ErrorCode Binary

Event ID 16650: The account-identifier allocator failed to initialize properly.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Message #

The account-identifier allocator failed to initialize properly.  The record data contains the NT error code that caused the failure.  The initialization will be retried until it succeeds; until that time; account creation will be denied on this Domain Controller.  Please look for other SAM event logs that may indicate the exact reason for the failure.

Event ID 16651: The request for a new account-identifier pool failed.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The request for a new account-identifier pool failed. The operation will be retried until the request succeeds. The error is.

Message #

The request for a new account-identifier pool failed. The operation will be retried until the request succeeds. The error is 
 " %1 "

Fields #

NameDescription
ErrorMessage UnicodeString

Event ID 16652: The domain controller is booting to directory services restore mode.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The domain controller is booting to directory services restore mode.

Message #

The domain controller is booting to directory services restore mode.

Event ID 16653: A pool size for account-identifiers (RIDs) that was configured by an Administrator is greater than the supported maximum.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

A pool size for account-identifiers (RIDs) that was configured by an Administrator is greater than the supported maximum. The maximum value of Maximum will be used when the domain controller is the RID master. See http://go.microsoft.com/fwlink/?LinkId=225963 for more information.

Message #

A pool size for account-identifiers (RIDs) that was configured by an Administrator is greater than the supported maximum. The maximum value of %1 will be used when the domain controller is the RID master. 
See http://go.microsoft.com/fwlink/?LinkId=225963 for more information.

Fields #

NameDescription
Maximum UInt32

Event ID 16654: A pool of account-identifiers (RIDs) has been invalidated.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System
Level
Informational

Description

A pool of account-identifiers (RIDs) has been invalidated. This may occur in the following expected cases.

Message #

A pool of account-identifiers (RIDs) has been invalidated. This may occur in the following expected cases:
1. A domain controller is restored from backup. 
2. A domain controller running on a virtual machine is restored from snapshot. 
3. An administrator has manually invalidated the pool. 
See http://go.microsoft.com/fwlink/?LinkId=226247 for more information.

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-Directory-Services-SAM",
    "guid": "{0D4FDC09-8C27-494A-BDA0-505E4FD8ADAE}",
    "event_source_name": "",
    "event_id": 16654,
    "version": 0,
    "level": 4,
    "task": 0,
    "opcode": 0,
    "keywords": -9223372036854775808,
    "time_created": "2026-05-29T16:32:52.3615804+00:00",
    "event_record_id": 6697,
    "correlation": {
      "ActivityID": "{C6821FB2-EF88-0001-1820-82C688EFDC01}"
    },
    "execution": {
      "process_id": 812,
      "thread_id": 816
    },
    "channel": "System",
    "computer": "telemetry-DC-a.cell-a.ludus.domain",
    "security": {
      "user_id": "S-1-5-18"
    }
  },
  "event_data": {},
  "message": "A pool of account-identifiers (RIDs) has been invalidated. This may occur in the following expected cases:\r\n1. A domain controller is restored from backup. \r\n2. A domain controller running on a virtual machine is restored from snapshot. \r\n3. An administrator has manually invalidated the pool. \r\nSee http://go.microsoft.com/fwlink/?LinkId=226247 for more information."
}

Event ID 16655: The global maximum for account-identifiers (RIDs) has been increased to NewValue.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The global maximum for account-identifiers (RIDs) has been increased to NewValue.

Message #

The global maximum for account-identifiers (RIDs) has been increased to %1. 
 See http://go.microsoft.com/fwlink/?LinkId=233329 for more information including important operating system interoperability requirements.

Fields #

NameDescription
NewValue UInt32

Event ID 16656: Action required!

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

Action required! An account-identifier (RID) pool was allocated to this domain controller. The pool value indicates this domain has consumed a considerable portion of the total available account-identifiers. A protection mechanism will be activated when the domain reaches the following threshold of total available account-identifiers remaining: CeilingTriggerRid. The protection mechanism prevents the allocation of account-identifier (RID) pools needed to allow existing DCs to create additional users, computers and groups, or promote new DCs into the domain. The mechanism will remain active until the Administrator manually re-enables account-identifier allocation on the RID master domain controller. See http://go.microsoft.com/fwlink/?LinkId=228610 for more information.

Message #

Action required! An account-identifier (RID) pool was allocated to this domain controller. The pool value indicates this domain has consumed a considerable portion of the total available account-identifiers. 

A protection mechanism will be activated when the domain reaches the following threshold of total available account-identifiers remaining: %1.  The protection mechanism prevents the allocation of account-identifier (RID) pools needed to allow existing DCs to create additional users, computers and groups, or promote new DCs into the domain. The mechanism will remain active until the Administrator manually re-enables account-identifier allocation on the RID master domain controller. 

See http://go.microsoft.com/fwlink/?LinkId=228610 for more information.

Fields #

NameDescription
CeilingTriggerRid UInt32

Event ID 16657: Action required!

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

Action required! This domain has consumed a considerable portion of the total available account-identifiers (RIDs). A protection mechanism has been activated because the total available account-identifiers remaining is approximately: CeilingTriggerRid. The protection mechanism prevents the allocation of account-identifier (RID) pools needed to allow existing DCs to create additional users, computers and groups, or promote new DCs into the domain. The mechanism will remain active until the Administrator manually re-enables account-identifier (RID) allocation on the RID master domain controller. It is extremely important that certain diagnostics be performed prior to re-enabling account creation to ensure this domain is not consuming account-identifiers at an abnormally high rate. Any issues identified should be resolved prior to re-enabling account creation. Failure to diagnose and fix any underlying issue causing an abnormally high rate of account-identifier consumption can lead to account-identifier (RID) pool exhaustion in the domain after which account creation will be permanently disabled in this domain. See http://go.microsoft.com/fwlink/?LinkId=228610 for more information.

Message #

Action required! This domain has consumed a considerable portion of the total available account-identifiers (RIDs). A protection mechanism has been activated because the total available account-identifiers remaining is approximately: %1. 

The protection mechanism prevents the allocation of account-identifier (RID) pools needed to allow existing DCs to create additional users, computers and groups, or promote new DCs into the domain.  The mechanism will remain active until the Administrator manually re-enables account-identifier (RID) allocation on the RID master domain controller. 

It is extremely important that certain diagnostics be performed prior to re-enabling account creation to ensure this domain is not consuming account-identifiers at an abnormally high rate. Any issues identified should be resolved prior to re-enabling account creation. 

Failure to diagnose and fix any underlying issue causing an abnormally high rate of account-identifier consumption can lead to account-identifier (RID) pool exhaustion in the domain after which account creation will be permanently disabled in this domain. 

See http://go.microsoft.com/fwlink/?LinkId=228610 for more information.

Fields #

NameDescription
CeilingTriggerRid UInt32

Event ID 16658: This event is a periodic update on the remaining total quantity of available account-identifiers (RIDs).

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

This event is a periodic update on the remaining total quantity of available account-identifiers (RIDs). The number of remaining account-identifiers is approximately: RemainingRids.

Message #

This event is a periodic update on the remaining total quantity of available account-identifiers (RIDs). The number of remaining account-identifiers is approximately: %1. 

Account-identifiers are used as accounts are created, when they are exhausted no new accounts may be created in the domain. 

See http://go.microsoft.com/fwlink/?LinkId=228745 for more information.

Fields #

NameDescription
RemainingRids UInt32

Event ID 16935: Failed to secure the machine account ComputerName.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

Failed to secure the machine account ComputerName. Have an administrator remove the builtin\account operators full control Access Control Entry from the security descriptor on this object.

Message #

Failed to secure the machine account %1.  Have an administrator remove the builtin\account operators full control Access Control Entry from the security descriptor on this object.

Fields #

NameDescription
ComputerName UnicodeString
__binLength UInt32
ErrorCode Binary

Event ID 16936: Failed to secure the machine account ComputerName.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

Failed to secure the machine account ComputerName. This operation will be retried. Have an administrator verify the builtin\account operators full control Access Control Entry was removed from the security descriptor on this object.

Message #

Failed to secure the machine account %1.  This operation will be retried. Have an administrator verify the builtin\account operators full control Access Control Entry was removed from the security descriptor on this object.

Fields #

NameDescription
ComputerName UnicodeString
__binLength UInt32
ErrorCode Binary

Event ID 16937: Secured the machine account Name.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System
Level
Informational

Description

Secured the machine account Name. The builtin\account operators full control Access Control Entry was removed from the security descriptor on this object.

Message #

Secured the machine account %1.  The builtin\account operators full control Access Control Entry was removed from the security descriptor on this object.

Fields #

NameDescription
ComputerName UnicodeString
__binLength
ErrorCode

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-Directory-Services-SAM",
    "guid": "0D4FDC09-8C27-494A-BDA0-505E4FD8ADAE",
    "event_source_name": "",
    "event_id": 16937,
    "version": 0,
    "level": 4,
    "task": 0,
    "opcode": 0,
    "keywords": 9223372036854775808,
    "time_created": "2022-04-07T08:14:31.637430+00:00",
    "event_record_id": 624,
    "correlation": {},
    "execution": {
      "process_id": 648,
      "thread_id": 652
    },
    "channel": "System",
    "computer": "WIN-FPV0DSIC9O6.lab.local",
    "security": {
      "user_id": "S-1-5-18"
    }
  },
  "event_data": {
    "Name": "SAMMSG_MACHINE_ACCOUNT_SECURE",
    "ComputerName": "",
    "Binary": "00000000"
  },
  "message": ""
}

References #

Event ID 16944: The certificate that is used for authentication does not have an issuance policy descriptor corresponding to OID OID in the Active Directory database.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The certificate that is used for authentication does not have an issuance policy descriptor corresponding to OID OID in the Active Directory database. This certificate will not be associated with a corresponding security identifier (SID), and the user may be denied access to some resources if you have resources whose access is restricted based on this issuance policy. The error is ErrorCode.

Message #

The certificate that is used for authentication does not have an issuance policy descriptor corresponding to OID %1 in the Active Directory database. This certificate will not be associated with a corresponding security identifier (SID), and the user may be denied access to some resources if you have resources whose access is restricted based on this issuance policy. The error is %2.

Fields #

NameDescription
OID UnicodeString
ErrorCode UInt32

Event ID 16945: The certificate issuance policy that is represented by OID OID Object DN does not have a link to a security identifier (SID), or this link cannot be read.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The certificate issuance policy that is represented by OID OIDObjectDN does not have a link to a security identifier (SID), or this link cannot be read. The link is represented by the attribute msDS-OIDToGroupLink on the msPKI-Enterprise-Oid object that represents the issuance policy. This certificate will not be associated with a corresponding SID, and the user may be denied access to some resources if you have resources whose access is restricted based on this issuance policy.

Message #

The certificate issuance policy that is represented by OID %2 does not have a link to a security identifier (SID), or this link cannot be read. The link is represented by the attribute msDS-OIDToGroupLink on the msPKI-Enterprise-Oid object that represents the issuance policy. This certificate will not be associated with a corresponding SID, and the user may be denied access to some resources if you have resources whose access is restricted based on this issuance policy.

Fields #

NameDescription
OID UnicodeString
OIDObjectDN UnicodeString
ErrorCode UInt32

Event ID 16946: Multiple certificate issuance policy descriptors were found in the Active Directory database.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

Multiple certificate issuance policy descriptors were found in the Active Directory database. The attribute msPKI-Cert-Template-OID of these descriptors contains string OID. This attribute should be able to uniquely identify an issuance policy descriptor; you should resolve this conflict. The issuance policies that are affected will not be associated with security identifiers (SIDs), and users who are authenticating using certificates that are issued by the corresponding policy may be denied access to some resources.

Message #

Multiple certificate issuance policy descriptors were found in the Active Directory database. The attribute msPKI-Cert-Template-OID of these descriptors contains string %1.  This attribute should be able to uniquely identify an issuance policy descriptor; you should resolve this conflict. The issuance policies that are affected will not be associated with security identifiers (SIDs), and users who are authenticating using certificates that are issued by the corresponding policy may be denied access to some resources.

Fields #

NameDescription
OID UnicodeString

Event ID 16947: The certificate issuance policy descriptor OID Object DN is linked through its attribute msDS-OIDToGroupLink to a group that is not a security group, has memb...

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The certificate issuance policy descriptor OID Object DN is linked through its attribute msDS-OIDToGroupLink to a group that is not a security group, has members, or is not universal. The error is ErrorCode.

Message #

The certificate issuance policy descriptor %2 is linked through its attribute msDS-OIDToGroupLink to a group that is not a security group, has members, or is not universal. The error is %6.
An issuance policy should be linked to a security identifier (SID) of a group that is security enabled, does not have members, and is universal. Users who are authenticating using certificates that are issued according to this policy may be denied access to some resources. The distinguished name (also known as DN) of the group that does not meet these requirements is %3.

Fields #

NameDescription
OID UnicodeString
OIDObjectDN UnicodeString
GroupDN UnicodeString
GroupGUID UnicodeString
GroupSID UnicodeString
ErrorCode UInt32

Event ID 16948: The requested modification for group Group DN could not be performed.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The requested modification for group GroupDN could not be performed. This is because this group is linked through msDS-OIDToGroupLinkBl to a certificate issuance policy descriptor. Such groups should be security enabled, they should not have any members, and they should be universal. The requested operation was Operation. The error is ErrorCode.

Message #

The requested modification for group %1 could not be performed. This is because this group is linked through msDS-OIDToGroupLinkBl to a certificate issuance policy descriptor. Such groups should be security enabled, they should not have any members, and they should be universal.
The requested operation was %4.
The error is %5.

Fields #

NameDescription
GroupDN UnicodeString
GroupGUID UnicodeString
GroupSID UnicodeString
Operation UnicodeString
Known values
%%2456
Open key file.
%%2457
Delete key file.
%%2458
Read persisted key from file.
%%2459
Write persisted key to file.
%%2464
Export of persistent cryptographic key.
%%2465
Import of persistent cryptographic key.
%%2480
Open Key.
%%2481
Create Key.
%%2482
Delete Key.
%%2483
Encrypt.
%%2484
Decrypt.
%%2485
Sign hash.
%%2486
Secret agreement.
%%2487
Domain settings.
%%2488
Local settings.
%%2489
Add provider.
%%2490
Remove provider.
%%2491
Add context.
%%2492
Remove context.
%%2493
Add function.
%%2494
Remove function.
%%2495
Add function provider.
%%2496
Remove function provider.
%%2497
Add function property.
%%2498
Remove function property.
%%2499
Machine key.
%%2500
User key.
%%2501
Key Derivation.
%%2502
Claim Creation.
%%2503
Claim Verification.
ErrorCode UInt32

Event ID 16949: The certificate issuance policy descriptor OID Name cannot be linked to group Group Name.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The certificate issuance policy descriptor OIDName cannot be linked to group GroupName. Issuance policies can be linked through the attribute msDS-OIDToGroupLink only to universal, security-enabled groups that have an empty membership. You should ensure that this group meets these requirements. The error is ErrorCode.

Message #

The certificate issuance policy descriptor %1 cannot be linked to group %2. Issuance policies can be linked through the attribute msDS-OIDToGroupLink only to universal, security-enabled groups that have an empty membership. You should ensure that this group meets these requirements.
The error is %5.

Fields #

NameDescription
OIDName UnicodeString
GroupName UnicodeString
GroupGUID UnicodeString
GroupSID UnicodeString
ErrorCode UInt32

Event ID 16950: The following invalid claims issued to user User have been dropped: DroppedClaims.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The following invalid claims issued to user User have been dropped: DroppedClaims.

Message #

The following invalid claims issued to user %1 have been dropped: %2.

Fields #

NameDescription
User UnicodeString
DroppedClaims UnicodeString

Event ID 16951: Claims issued to user User could not be validated and have been dropped.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

Claims issued to user User could not be validated and have been dropped. Error: Error code:.

Message #

Claims issued to user %1 could not be validated and have been dropped. Error: %2.

Fields #

NameDescription
User UnicodeString
Errorcode UInt32

Event ID 16952: Claims issued to user User could not be validated and have been dropped.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

Claims issued to user User could not be validated and have been dropped. Error: Error code:.

Message #

Claims issued to user %1 could not be validated and have been dropped. Error: %2.

Fields #

NameDescription
User UnicodeString
Errorcode UInt32

Event ID 16953: The password notification DLL NotificationPackage: failed to load with error Error code:.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The password notification DLL NotificationPackage failed to load with error Errorcode. Please verify that the notification DLL path defined in the registry, RegistrykeyRegistryvalue, refers to a correct and absolute path (<drive>:\<path>\<filename>.<ext>) and not a relative or invalid path. If the DLL path is correct, please validate that any supporting files are located in the same directory, and that the system account has read access to both the DLL path and any supporting files. Contact the provider of the notification DLL for additional support. Further details can be found on the web at http://go.microsoft.com/fwlink/?LinkId=245898.

Message #

The password notification DLL %1 failed to load with error %4. Please verify that the notification DLL path defined in the registry, %2%3, refers to a correct and absolute path (<drive>:\<path>\<filename>.<ext>) and not a relative or invalid path. If the DLL path is correct, please validate that any supporting files are located in the same directory, and that the system account has read access to both the DLL path and any supporting files.  Contact the provider of the notification DLL for additional support. Further details can be found on the web at http://go.microsoft.com/fwlink/?LinkId=245898.

Fields #

NameDescription
NotificationPackage UnicodeString
Registrykey UnicodeString
Registryvalue UnicodeString
Errorcode UInt32

Event ID 16960: SAM was configured to not listen on the TCP protocol.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

SAM was configured to not listen on the TCP protocol.

Message #

SAM was configured to not listen on the TCP protocol.

Event ID 16961: Legacy password validation mode has been enabled on this machine.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

Legacy password validation mode has been enabled on this machine. If an Exchange ActiveSync policy is configured it will not be enforced for password validation requests.

Message #

Legacy password validation mode has been enabled on this machine. If an Exchange ActiveSync policy is configured it will not be enforced for password validation requests.

Event ID 16962: Remote calls to the SAM database are being restricted using the default security descriptor: Name.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System
Level
Informational

Description

Remote calls to the SAM database are being restricted using the default security descriptor: Name.

Message #

Remote calls to the SAM database are being restricted using the default security descriptor: %1.
For more information please see http://go.microsoft.com/fwlink/?LinkId=787651.

Fields #

NameDescription
Default SD String:
DefaultSDString

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-Directory-Services-SAM",
    "guid": "{0D4FDC09-8C27-494A-BDA0-505E4FD8ADAE}",
    "event_source_name": "",
    "event_id": 16962,
    "version": 0,
    "level": 4,
    "task": 0,
    "opcode": 0,
    "keywords": -9223372036854775808,
    "time_created": "2026-05-29T16:32:50.8153223+00:00",
    "event_record_id": 6693,
    "correlation": {
      "ActivityID": "{C6821FB2-EF88-0001-1820-82C688EFDC01}"
    },
    "execution": {
      "process_id": 812,
      "thread_id": 816
    },
    "channel": "System",
    "computer": "telemetry-DC-a.cell-a.ludus.domain",
    "security": {
      "user_id": "S-1-5-18"
    }
  },
  "event_data": {
    "Default SD String:": ""
  },
  "message": "Remote calls to the SAM database are being restricted using the default security descriptor: .\r\nFor more information please see http://go.microsoft.com/fwlink/?LinkId=787651."
}

Event ID 16963: Remote calls to the SAM database are being restricted using the configured registry security descriptor: RegistrySDString.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

Remote calls to the SAM database are being restricted using the configured registry security descriptor: RegistrySDString.

Message #

Remote calls to the SAM database are being restricted using the configured registry security descriptor: %1.
For more information please see http://go.microsoft.com/fwlink/?LinkId=787651.

Fields #

NameDescription
RegistrySDString UnicodeString

Event ID 16964: The registry security descriptor is malformed: MalformedSDString.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The registry security descriptor is malformed: MalformedSDString.

Message #

The registry security descriptor is malformed: %1.
Remote calls to the SAM database are being restricted using the default security descriptor: %2.
For more information please see http://go.microsoft.com/fwlink/?LinkId=787651.

Fields #

NameDescription
MalformedSDString UnicodeString
DefaultSDString UnicodeString

Event ID 16965: A remote call to the SAM database has been denied.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

A remote call to the SAM database has been denied.

Message #

A remote call to the SAM database has been denied.
Client SID: %1
Network address: %2
For more information please see http://go.microsoft.com/fwlink/?LinkId=787651.

Fields #

NameDescription
ClientSID UnicodeString
ClientNetworkAddress UnicodeString

Event ID 16966: Audit only mode is now enabled for remote calls to the SAM database.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

Audit only mode is now enabled for remote calls to the SAM database. SAM will log an event for clients who would have been denied access in normal mode.

Message #

Audit only mode is now enabled for remote calls to the SAM database. SAM will log an event for clients who would have been denied access in normal mode. 
For more information please see http://go.microsoft.com/fwlink/?LinkId=787651.

Event ID 16967: Audit only mode is now disabled for remote calls to the SAM database.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

Audit only mode is now disabled for remote calls to the SAM database.

Message #

Audit only mode is now disabled for remote calls to the SAM database.
For more information please see http://go.microsoft.com/fwlink/?LinkId=787651.

Event ID 16968: Audit only mode is currently enabled for remote calls to the SAM database.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

Audit only mode is currently enabled for remote calls to the SAM database.

Message #

Audit only mode is currently enabled for remote calls to the SAM database.
The following client would have been normally denied access:
Client SID: %1 from network address: %2. 
For more information please see http://go.microsoft.com/fwlink/?LinkId=787651.

Fields #

NameDescription
ClientSID UnicodeString
ClientNetworkAddress UnicodeString

Event ID 16969: Suppressed Message Count: remote calls to the SAM database have been denied in the past Throttle window: seconds throttling window.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System
Level
Warning

Description

Suppressed Message Count: remote calls to the SAM database have been denied in the past Throttle window: seconds throttling window.

Message #

%2 remote calls to the SAM database have been denied in the past %1 seconds throttling window.
For more information please see http://go.microsoft.com/fwlink/?LinkId=787651.

Fields #

NameDescription
Throttle window:
Suppressed Message Count:
Throttlewindow UInt32
SuppressedMessageCount UInt32

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-Directory-Services-SAM",
    "guid": "{0D4FDC09-8C27-494A-BDA0-505E4FD8ADAE}",
    "event_source_name": "",
    "event_id": 16969,
    "version": 0,
    "level": 3,
    "task": 0,
    "opcode": 0,
    "keywords": -9223372036854775808,
    "time_created": "2026-03-18T03:17:55.2573947+00:00",
    "event_record_id": 3119,
    "correlation": {
      "ActivityID": "{B96DB0BB-B639-0003-D1B0-6DB939B6DC01}"
    },
    "execution": {
      "process_id": 1076,
      "thread_id": 7912
    },
    "channel": "System",
    "computer": "JD-WIN11-22H2-1.ludus.domain",
    "security": {
      "user_id": "S-1-5-18"
    }
  },
  "event_data": {
    "Throttle window:": "900",
    "Suppressed Message Count:": "1"
  },
  "message": "1 remote calls to the SAM database have been denied in the past 900 seconds throttling window.\r\nFor more information please see http://go.microsoft.com/fwlink/?LinkId=787651."
}

Event ID 16976: An error occurred while configuring one or more well-known accounts for this domain.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

An error occurred while configuring one or more well-known accounts for this domain. This may be due to a transient error condition. The task will retry periodically until successful. For more information please see https://go.microsoft.com/fwlink/?linkid=832473. Status: Status

Message #

An error occurred while configuring one or more well-known accounts for this domain.  This may be due to a transient error condition. The task will retry periodically until successful. For more information please see https://go.microsoft.com/fwlink/?linkid=832473.
Status: %1

Fields #

NameDescription
Status HexInt32NTSTATUS reference

Event ID 16977: The domain is configured with the following minimum password length-related settings.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System
Level
Informational

Description

The domain is configured with the following minimum password length-related settings.

Message #

The domain is configured with the following minimum password length-related settings.

MinimumPasswordLength: %1

RelaxMinimumPasswordLengthLimits: %2

MinimumPasswordLengthAudit: %3

For more information see https://go.microsoft.com/fwlink/?LinkId=2097191.

Fields #

NameDescription
MinimumPasswordLength Int32
RelaxMinimumPasswordLengthLimits Int32
MinimumPasswordLengthAudit Int32

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-Directory-Services-SAM",
    "guid": "{0D4FDC09-8C27-494A-BDA0-505E4FD8ADAE}",
    "event_source_name": "",
    "event_id": 16977,
    "version": 0,
    "level": 4,
    "task": 0,
    "opcode": 0,
    "keywords": -9223372036854775808,
    "time_created": "2026-05-29T16:32:52.4237289+00:00",
    "event_record_id": 6699,
    "correlation": {},
    "execution": {
      "process_id": 812,
      "thread_id": 816
    },
    "channel": "System",
    "computer": "telemetry-DC-a.cell-a.ludus.domain",
    "security": {
      "user_id": "S-1-5-18"
    }
  },
  "event_data": {
    "MinimumPasswordLength": "0",
    "RelaxMinimumPasswordLengthLimits": "0",
    "MinimumPasswordLengthAudit": "-1"
  },
  "message": "The domain is configured with the following minimum password length-related settings.\r\n\r\nMinimumPasswordLength: 0\r\n\r\nRelaxMinimumPasswordLengthLimits: 0\r\n\r\nMinimumPasswordLengthAudit: -1\r\n\r\nFor more information see https://go.microsoft.com/fwlink/?LinkId=2097191.\r\n"
}

Event ID 16978: The following account has been configured with a password whose length is shorter than the current MinimumPasswordLengthAudit setting.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The following account has been configured with a password whose length is shorter than the current MinimumPasswordLengthAudit setting.

Message #

The following account has been configured with a password whose length is shorter than the current MinimumPasswordLengthAudit setting.

AccountName: %1

MinimumPasswordLength: %2

MinimumPasswordLengthAudit: %3

For more information see https://go.microsoft.com/fwlink/?LinkId=2097191.

Fields #

NameDescription
AccountName UnicodeString
MinimumPasswordLength Int32
MinimumPasswordLengthAudit Int32

Event ID 16979: The domain is incorrectly configured with a MinimumPasswordLength setting that is greater than 14 while RelaxMinimumPasswordLengthLimits is either ...

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The domain is incorrectly configured with a MinimumPasswordLength setting that is greater than 14 while RelaxMinimumPasswordLengthLimits is either undefined or disabled.

Message #

The domain is incorrectly configured with a MinimumPasswordLength setting that is greater than 14 while RelaxMinimumPasswordLengthLimits is either undefined or disabled.

NOTE: until this is corrected, the domain will enforce a smaller MinimumPasswordLength setting of 14.

Currently configured MinimumPasswordLength value: %1

For more information see https://go.microsoft.com/fwlink/?LinkId=2097191.

Fields #

NameDescription
MinimumPasswordLength Int32

Event ID 16980: The security account manager has detected the use of a ROCA-vulnerable Windows Hello for Business key during authentication by the following account.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The security account manager has detected the use of a ROCA-vulnerable Windows Hello for Business key during authentication by the following account. The policy is currently configured for audit so the authentication was allowed to proceed. Account DN: AccountDN Account SID: AccountSID KeyHash: KeyHash For more information see https://go.microsoft.com/fwlink/?linkid=2116430.

Message #

The security account manager has detected the use of a ROCA-vulnerable Windows Hello for Business key during authentication by the following account. The policy is currently configured for audit so the authentication was allowed to proceed.

Account DN: %1

Account SID: %2

KeyHash: %3

For more information see https://go.microsoft.com/fwlink/?linkid=2116430.

Fields #

NameDescription
AccountDN UnicodeString
AccountSID UnicodeString
KeyHash UnicodeString

Event ID 16981: The security account manager has detected and blocked the use of a ROCA-vulnerable Windows Hello for Business key during authentication by the foll...

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The security account manager has detected and blocked the use of a ROCA-vulnerable Windows Hello for Business key during authentication by the following account.

Message #

The security account manager has detected and blocked the use of a ROCA-vulnerable Windows Hello for Business key during authentication by the following account.

Account DN: %1

Account SID: %2

KeyHash: %3

For more information see https://go.microsoft.com/fwlink/?linkid=2116430.

Fields #

NameDescription
AccountDN UnicodeString
AccountSID UnicodeString
KeyHash UnicodeString

Event ID 16982: The security account manager is now logging verbose events for remote clients that call legacy password change or set RPC methods.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The security account manager is now logging verbose events for remote clients that call legacy password change or set RPC methods. This setting may cause large number of messages and should only be used for a short period time to diagnose problems. For more information please see https://go.microsoft.com/fwlink/?linkid=2150956.

Message #

The security account manager is now logging verbose events for remote clients that call legacy password change or set RPC methods. This setting may cause large number of messages and should only be used for a short period time to diagnose problems.

For more information please see https://go.microsoft.com/fwlink/?linkid=2150956.

Event ID 16983: The security account manager is now logging periodic summary events for remote clients that call legacy password change or set RPC methods.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System
Level
Informational

Description

The security account manager is now logging periodic summary events for remote clients that call legacy password change or set RPC methods.

Message #

The security account manager is now logging periodic summary events for remote clients that call legacy password change or set RPC methods.

For more information please see https://go.microsoft.com/fwlink/?linkid=2150956.

Fields #

NameDescription
Name

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-Directory-Services-SAM",
    "guid": "{0D4FDC09-8C27-494A-BDA0-505E4FD8ADAE}",
    "event_source_name": "",
    "event_id": 16983,
    "version": 0,
    "level": 4,
    "task": 0,
    "opcode": 0,
    "keywords": -9223372036854775808,
    "time_created": "2026-05-29T16:32:52.4237343+00:00",
    "event_record_id": 6700,
    "correlation": {},
    "execution": {
      "process_id": 812,
      "thread_id": 816
    },
    "channel": "System",
    "computer": "telemetry-DC-a.cell-a.ludus.domain",
    "security": {
      "user_id": "S-1-5-18"
    }
  },
  "event_data": {},
  "message": "The security account manager is now logging periodic summary events for remote clients that call legacy password change or set RPC methods.\r\n\r\nFor more information please see https://go.microsoft.com/fwlink/?linkid=2150956.\r\n"
}

Event ID 16984: The security account manager detected Number of RPC methods: legacy password change or set RPC method calls in the past Throttle Window: minutes.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The security account manager detected Number of RPC methods: legacy password change or set RPC method calls in the past Throttle Window: minutes.

Message #

The security account manager detected %1 legacy password change or set RPC method calls in the past %2 minutes.

For more information please see https://go.microsoft.com/fwlink/?linkid=2150956.

Fields #

NameDescription
NumberofRPCmethods UInt32
ThrottleWindow UInt32

Event ID 16985: The security account manager detected the use of a legacy password change or set RPC method from a network client.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The security account manager detected the use of a legacy password change or set RPC method from a network client.

Message #

The security account manager detected the use of a legacy password change or set RPC method from a network client.
Consider upgrading the client operating system or application to use the latest and more secure version of this method.

Details:

RPC Method: %1
Client Network Address: %4
Client SID: %3
Username: %2

For more information please see https://go.microsoft.com/fwlink/?linkid=2150956.

Fields #

NameDescription
RPCMethod UnicodeString
UserAccountName UnicodeString
ClientSID UnicodeString
ClientNetworkAddress UnicodeString

Event ID 16986: The security account manager has detected one or more duplicated names for a local account.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The security account manager has detected one or more duplicated names for a local account. This inconsistency was remediated by keeping one account name and deleting the remaining names.

Message #

The security account manager has detected one or more duplicated names for a local account. This inconsistency was remediated by keeping one account name and deleting the remaining names.

RID=%1(%2)

Retained account name: %3

Deleted account name(s): %4

For more information see https://go.microsoft.com/fwlink/?linkid=2134956.

Fields #

NameDescription
AccountRidHex HexInt32
AccountRid Int32
SavedAccountName UnicodeString
DeletedAccountNames UnicodeString

Event ID 16987: The security account manager has detected one or more duplicated names for a local account.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The security account manager has detected one or more duplicated names for a local account. This inconsistency may cause application failures and\or system instability. No changes were made since the policy is in detect-only mode. Details: RID=AccountRidHex(AccountRid) Duplicate account names: DuplicatedAccountNames If the policy had been set to repair mode, the following account name would have been retained and all others deleted: Account name to retain: RetainedAccountName For more information see https://go.microsoft.com/fwlink/?linkid=2134956.

Message #

The security account manager has detected one or more duplicated names for a local account. This inconsistency may cause application failures and\or system instability. No changes were made since the policy is in detect-only mode.

Details:

RID=%1(%2)

Duplicate account names: %3

If the policy had been set to repair mode, the following account name would have been retained and all others deleted:

Account name to retain: %4

For more information see https://go.microsoft.com/fwlink/?linkid=2134956.

Fields #

NameDescription
AccountRidHex HexInt32
AccountRid Int32
DuplicatedAccountNames UnicodeString
RetainedAccountName UnicodeString

Event ID 16988: The security account manager encountered one or more fatal errors on startup which will not allow the machine to start.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The security account manager encountered one or more fatal errors on startup which will not allow the machine to start.

Message #

The security account manager encountered one or more fatal errors on startup which will not allow the machine to start.

Service startup error status:%1

More details may be found in the event data.

For more information see https://go.microsoft.com/fwlink/?linkid=2157228.

Fields #

NameDescription
StatusHex HexInt32
__binLength UInt32
DiagnosticInfo Binary

Event ID 16989: The security account manager encountered one or more non-fatal errors on startup.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The security account manager encountered one or more non-fatal errors on startup.

Message #

The security account manager encountered one or more non-fatal errors on startup.

More details may be found in the event data.

For more information see https://go.microsoft.com/fwlink/?linkid=2157228.

Fields #

NameDescription
__binLength UInt32
DiagnosticInfo Binary

Event ID 16990: The security account manager blocked a non-administrator from creating an Active Directory account in this domain with mismatched objectClass and u...

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The security account manager blocked a non-administrator from creating an Active Directory account in this domain with mismatched objectClass and userAccountControl account type flags.

Message #

The security account manager blocked a non-administrator from creating an Active Directory account in this domain with mismatched objectClass and userAccountControl account type flags.

Details:

Account name: %1
Account objectClass: %2
userAccountControl: %3
Caller address: %4
Caller SID: %5

For more information see https://go.microsoft.com/fwlink/?linkid=2173873.

Fields #

NameDescription
Accountname UnicodeString
AccountobjectClass UnicodeString
userAccountcontrol UInt32
Calleraddress UnicodeString
CallerSID UnicodeString

Detection Patterns #

Event ID 16991: The security account manager blocked a non-administrator from creating or renaming a computer account using an invalid sAMAccountName.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The security account manager blocked a non-administrator from creating or renaming a computer account using an invalid sAMAccountName. sAMAccountName on computer accounts must end with a single trailing $ sign. Attempted sAMAccountName: SamAccountName Recommended sAMAccountName: SamAccountName$ For more information see https://go.microsoft.com/fwlink/?linkid=2173873.

Message #

The security account manager blocked a non-administrator from creating or renaming a computer account using an invalid sAMAccountName. sAMAccountName on computer accounts must end with a single trailing $ sign.

Attempted sAMAccountName: %1
Recommended sAMAccountName: %1$

For more information see https://go.microsoft.com/fwlink/?linkid=2173873.

Fields #

NameDescription
SamAccountName UnicodeString

Detection Patterns #

Event ID 16992: The security account manager is now configuring the local password and lockout policies in accordance with regional policy.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The security account manager is now configuring the local password and lockout policies in accordance with regional policy.

Message #

The security account manager is now configuring the local password and lockout policies in accordance with regional policy.

Event ID 16993: The security account manager successfully initialized the Local Administrator Password Solution (LAPS) extension dll.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System
Level
Informational

Description

The security account manager successfully initialized the Local Administrator Password Solution (LAPS) extension dll.

Message #

The security account manager successfully initialized the Local Administrator Password Solution (LAPS) extension dll.

Example Event #

{
  "system": {
    "provider": "Microsoft-Windows-Directory-Services-SAM",
    "guid": "{0d4fdc09-8c27-494a-bda0-505e4fd8adae}",
    "event_source_name": "",
    "event_id": 16993,
    "version": 0,
    "level": 4,
    "task": 0,
    "opcode": 0,
    "keywords": 9223372036854775808,
    "time_created": "2026-05-08 00:27:36.762852+00:00",
    "event_record_id": 973,
    "correlation": {
      "ActivityID": "{6ef2400c-de81-0003-2e40-f26e81dedc01}",
      "RelatedActivityID": ""
    },
    "execution": {
      "process_id": 988,
      "thread_id": 992
    },
    "channel": "System",
    "computer": "tel2-WIN11-25H2-1.ludus.domain",
    "security": {
      "user_id": "S-1-5-18"
    }
  },
  "event_data": {},
  "message": "The security account manager successfully initialized the Local Administrator Password Solution (LAPS) extension dll.\r\n"
}

Event ID 16994: The security account manager failed to initialize the Local Administrator Password Solution (LAPS) extension dll.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The security account manager failed to initialize the Local Administrator Password Solution (LAPS) extension dll.

Message #

The security account manager failed to initialize the Local Administrator Password Solution (LAPS) extension dll.

Status:%1

Fields #

NameDescription
Status HexInt32NTSTATUS reference

Event ID 16995: The security account manager is using the specified security descriptor for validation of computer account re-use attempts during domain join.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The security account manager is using the specified security descriptor for validation of computer account re-use attempts during domain join.

Message #

The security account manager is using the specified security descriptor for validation of computer account re-use attempts during domain join.

SDDL Value: %1.

This allow list is configured through group policy in Active Directory.
For more information please see http://go.microsoft.com/fwlink/?LinkId=2202145.

Fields #

NameDescription
RegistrySDString UnicodeString

Event ID 16996: The security descriptor that contains the computer account re-use allow list being used to validate client requests during domain join is malformed.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The security descriptor that contains the computer account re-use allow list being used to validate client requests during domain join is malformed.

Message #

The security descriptor that contains the computer account re-use allow list being used to validate client requests during domain join is malformed.

SDDL Value: %1.

This allow list is configured through group policy in Active Directory.To correct this problem an administrator will need to update the policy and set this value to a valid security descriptor or disable the policy.
For more information please see http://go.microsoft.com/fwlink/?LinkId=2202145.

Fields #

NameDescription
RegistrySDString UnicodeString

Event ID 16997: The security account manager found a computer account that appears to be orphaned and does not have an existing owner.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The security account manager found a computer account that appears to be orphaned and does not have an existing owner.

Message #

The security account manager found a computer account that appears to be orphaned and does not have an existing owner.

Computer Account: %1
Computer Account Owner: %2

For more information please see http://go.microsoft.com/fwlink/?LinkId=2202145.

Fields #

NameDescription
ComputerAccountSID UnicodeString
ComputerAccountOwnerSID UnicodeString

Event ID 16998: The security account manager rejected a client request to re-use a computer account during domain join.

#
Provider
Microsoft-Windows-Directory-Services-SAM
Channel
System

Description

The security account manager rejected a client request to re-use a computer account during domain join.

Message #

The security account manager rejected a client request to re-use a computer account during domain join.
The computer account and the client identity did not meet the required security validation checks.

Client Account: %3
Computer Account: %1
Computer Account Owner: %2

Check the record data of this event for the NT Error code.
For more information please see http://go.microsoft.com/fwlink/?LinkId=2202145.

Fields #

NameDescription
ComputerAccountSID UnicodeString
ComputerAccountOwnerSID UnicodeString
ClientUserAccountSID UnicodeString
__binLength UInt32
ErrorCode Binary

Provenance

Where this provider's schema came from, and which Windows build it was observed on. Windows can change a provider's event schema between builds, so use this to judge whether it matches the build you collect from.

ETW provider GUID 0d4fdc09-8c27-494a-bda0-505e4fd8adae

Defined in samsrv.dll, which carries the event manifest.

Observed on:

  • WS2022-20348.4893, schema read from the registered manifest, binary version 10.0.20348.2849, captured 2026-06-02
  • Win11-26200.6584, schema read from the registered manifest, binary version 10.0.26100.1882, captured 2026-06-02

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