I'm trying to add the first 2008 R2 DC to an existing 2003 domain (upgraded to 2003 functionality). I've followed the steps from microsoft which are clarified by this post:
2003 DC AD upgrade to 2008 on second server migration plan
While running adprep /forestprep I lost my connection and wasn't able to resume or remote control that session, so I couldn't see the end result of the command.
Rerunning adprep /forestprep indicates that the process has already been completed successfully. After finishing the rest of the steps (/domainprep … and /gpprep, etc), the 2008 server fails on dcpromo. The error message is the same "you need to run forestprep first"
So the situation I'm in is that I can't rerun /forestprep, but my Registry key still reads schemaVer=30. Should I have staged forest upgrades? Any ideas how to get my schema ver to 44 at this point?
Best Answer
You can try running through dcdiag /fix and possibly using the netdiag /fix (might have to download netdiag separately, it's been a while..) from the 2003 DC. After that, try running the /forestprep and /domainprep again