We are in the process of demoting one of our Domain Controllers (Windows 2003). We have built a Windows 2008 R2 server to replace the Win2003 DC. No FSMO roles on the Win2003 - DHCP/DNS/GC/File server roles only. We have setup DHCP/DNS/GC - Promoted Win2008 R2 server at this site. Replication seems fine.
When running dcpromo on the Win2003 server; process went through connected to new DC, following services were stopped: NetLogon, ISMServ and KDC, removing AD objects then following error popped up:
The operation failed because:
Active directory could not configure the computer account on the remote domain controller.
"Cannot complete this function."
We are unable to proceed with demoting this domain controller.