I have a friend who is having problems. He wanted to exchange 2003 onto his network. So he did a 2003 domain prep (even though he wasn't going to be running Windows 2003 DC's!!) on his network. He then installed a Windows 2003 member server, and did a exchange 2003 schema prep.
Now his network is having lots of problems! He is running a Windows 2000 PDC, and a Windows NT BDC. He cannot log on as Domain Admin, the only account that works is the account that he used to do a schema update. His NT4 workstations can log on now and again.
My first thought is that because he has put the Windows 2003 schema on the 2000 network without installing 2003 DC's this has messed things up. Am i correct in thinking this? Is there anyway to restore the schema otherwise than doing a authorative restore on the 2000 DC?