I have a couple of question regarding migrating from NT 4 Server to Server 2003. If the NT 4 PDC was upgraded to Windows Server 2003 but shortly after the upgrade there are issues because of the upgrade, what would happen if the 2003 server were shut down and an NT BDC server was promoted to PDC? Would all former NT functionality be regained or would things be slightly different because the 2003 server had been able to replicate?