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Well-Known Group Upgrade

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Applies To: Windows Server 2008 R2

When a computer is promoted to become a domain controller, the Well-Known Group Upgrade process recreates required well-known groups and local groups that are not present when you install Active Directory Domain Services (AD DS) to make a computer a domain controller.

Events

Event ID Source Message

16407

SAM

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

DB Upgrade/DC Promotion/DC Demotion

Active Directory