Just ran ADPREP to prepare forest and domain for Win 2008 R2 DCs. Currently, primary DC is Win 2003 R2. All other DCs are Win 2008. The domain functional level is Windows Server 2003. The forest functional level is Windows 2000.
Do I care? Should both be at least Windows 2003? How do I upgrade them? Make PDC a Win 2008 DC? Please advise. Thanks.