I raised the functional level of my Windows Server 2003 domain environment today. It is a small domain, with 2 domain controllers. After raising the domain functional level, I raised the forest fuctional level. Within an hour, I could no longer connect to any of my servers through terminal services.
After logging on locally, I discovered additional problems. ADUC (on either DC) would not open without errors. I could however, still open the ADUC console, and select "Connect to Domain Controller" which would bring up a dialog asking if I would like to manage the domain with that server. I select yes, and it opens ADUC after that.
However, now, I cannot join workstations or servers to the domain. I receive an error that says "A domain controller for the domain could not be contacted." Also, when I run DCDIAG on my primary DC, I get errors stating that it cannot contact a GC or domain controller. I've attached this output to the question as a txt file.
I can still login to the servers locally, and workstations so far seem to be unaffected. Does anyone have any advice to get the domain back up and running?