I'm setting up a new server machine running windows server 2012 r2 and wanted to make this a domain controller. So I added it first as a member server to the existing domain we have. Current DC is a 2003 server. However the functional level is still Windows 2000 because it used to connect to another windows 2000 DC. The DC with Windows 2000 has been retired a year ago and I still see the name of the retired DC in active directory, although I couldn't really manage it because its not connected anymore. Following what I read about manually raising domain functional level to Windows Server 2003 using adsiedit.msc (changing msDS-Behavior from value 0 to 2) as well as the forest's functional level, is there any other thing I need to do and check? I dont want to mess the only server (DC) we have and need a smooth DCPROMO on the 2012 Server.
Need a detailed help.