I upgraded my Windows 2000 domain functionality to 2008 R2. Made my 2008 R2 machines domain controllers. Replication is working.
Eventually I will demote the 2000 servers. At the moment, the Windows 2000 SP4, because I just upgraded, is still the FSMO role holder.
When I transfer my FSMO roles to the 2008 R2 server, will my Windows 2000 SP4 machines still be domain controllers and be able to authenticate? I know that I have to use dcpromo to demote them, but in reality, when I move those roles will they still be authenticating?