I have a Windows 2000 Server box that runs exchange and went down and a new 2003 Server box w/ Terminal Services Server installed. I managed to get the 2000 Server box back up and setup and successfully got the the DNS server to replicate,the Active Directory to replicate(after running adprep with the /forestprep and /domainprep switches), and have managed to get the FSMO roles to transfer to the 2003 box. I setup the old Windows 2000 Server box as a GC. This is where the issue begins. The Windows 2000 Server OS has crapped out. So, on a different hard drive in the same 2000 box, I have reinstalled 2000 server, but the second I take the old OS offline to switch to the OS I've rebuilt, the clients can no longer find the domain which is on the 2003 Server box! I think it's DNS related, but then again...I don' know. If I open up the DNS server and AD in the 2003 server, they're both there. Also, the 2003 Server is the DHCP server too. I cannot get the DNS server to replicate onto the new Windows 2000 install and manually setting it up isn't fixing the problem either! Without being able to find the domain, I can't pull AD back over to make it a GC again! My question is, If I run dcpromo on the 2000 box/drive that is the GC and demote it, will that help fix my problem so I can take it offline and have the 2003 box as the PDC in order to replicate onto the new box and have the ability for the clients to see the domain by itself? Or will this hose my hole domain?