Event Id | 638 |
Source | Security |
Description | Security Enabled Local 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 Information | According to Microsoft: Cause : This event record indicates that a local group has been deleted. There is no Failure Audit form of this audit event record. Resolution : This is an information event. |
Reference Links | Event ID 638 from Source Security Alternate Event ID in Vista and Windows Server 2008 is 4734. |
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