Applies to:

Windows Server 2008, 2008 R2 and 2012

Requirement: 

You would like to investigate who has added or removed a specific Domain User in Domain Admins or Group Policy Creator Owners

Prerequisite:

Auditing has to be configured on Domain controllers, especially, “Audit account management” policy must be configured and you need to define both Success and Failure policy settings. To configure Auditing on Domain Controllers, you need to edit and update DDCP (Default Domain Controller Policy)

When a User is Added to Security-Enabled GLOBAL Group, an event will be logged with Event ID: 4728

Event Details for Event ID: 4728

A member was added to a security-enabled global group.
 Subject:
  Security ID:  TESTLAB\Santosh
  Account Name:  Santosh
  Account Domain:  TESTLAB
  Logon ID:  0x50B79DA
 Member:
  Security ID:  TESTLAB\Temp
  Account Name:    CN=Temp,CN=Users,DC=AD,DC=TESTLAB,DC=NET
 Group:
  Security ID:  TESTLAB\Domain Admins
  Group Name:  Domain Admins
  Group Domain:  TESTLAB

 

In this example, TESTLAB\Santosh has added user TESTLAB\Temp to Domain Admins group.

When a User is removed from Security-Enabled GLOBAL Group, an event will be logged with Event ID: 4729

Event Details for Event ID: 4729

A member was removed from a security-enabled global group.
 Subject:
  Security ID:  TESTLAB\Santosh
  Account Name:  Santosh
  Account Domain:  TESTLAB
  Logon ID:  0x50B79DA
 Member:
  Security ID:  TESTLAB\Temp
  Account Name:  CN=Temp,CN=Users,DC=AD,DC=TESTLAB,DC=NET
 Group:
  Security ID:  TESTLAB\Domain Admins
  Group Name:    Domain Admins
  Group Domain:  TESTLAB

 In this example, TESTLAB\Santosh has removed user TESTLAB\Temp from Domain Admins group.

See also: