Event ID - 634

Event Id634
DescriptionSecurity Enabled Global Group Deleted:

Target Account Name: <Target Account Name>
      Target Domain: <Target Domain>
      Target Account ID: <Target Account ID>
      Caller User Name: <Caller User Name>
      Caller Domain: <Caller Domain>
      Caller Logon ID: <Caller Logon ID>
      Privileges: <Privileges>      

Event InformationAccording to Microsoft :
Cause :
This event is logged when a global group has been deleted.
Resolution :This is an information event and no user action is required.
Reference LinksEvent ID 634 from Source security

Alternate Event ID in Vista and Windows Server 2008 is 4730.

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