for a recovery test we restored one (out of 5) domain controller and the needed servers. however we found out that the domain controller (wich hold the PDC-Emulator) was functioning in a failsafe mode. the quick work around was to delete all other domain controllers from the domain controller ou. after a reboot the dc was working fine.
So the domain controller checks if at least X domain controllers are online before start functioning. however i can't find what the number X should be.
hope someone here can clear this out.
Kind regards, Mark