Domain Functional Level
Updated: November 25, 2009
Applies To: Windows Server 2008 R2
The Security Accounts Manager (SAM) is a service that is used during the logon process. The SAM maintains user account information, including groups to which a user belongs. The SAM is attempting to change the domain functional level to a state that provides new features but has less compatibility with earlier versions of the operating system.
|Domain functional level has been changed to Windows 2000 Native. The change cannot be reversed.|