Well-Known Group Upgrade

Applies To: Windows Server 2008

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.


Event ID Source Message



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