Have recently taken over a new client who have a small network with a couple of servers:
Previous IT guru attempted (and successfully?) upgraded their AD schema to 2008 (in preparation for their move to Exchange 2010 & new 2008 Servers), however one of their DCs failed the upgrade. Server was due to be decommissioned but was overlooked during the upgrade, has some serious OS issues that prevent communication to the network.
Should I manually remove it from the AD environment with NTDSutil (following steps identified here:http://www.petri.co.il/delete_failed_dcs_from_ad.htm
) or am I better off trying to repair the OS and decommission via DCPromo?
Previous IT guy had attempted repairs, but AD replication errors & DNS resolution issues (due to non-replication of AD) that are piling up encouraged him to find greener pastures.
All FSMO roles, DHCP & DNS services have been transferred off the old server some time ago, and DCDiag doesn't report any issues with their primary DC (Secondary GC Servers are reporting replication warnings!).