I ran dcpromo to demote a W2K3 dc. The wizard completed without a hitch. However, there are now a few anomalies:
Launching nslookup from the remaining dc (W2K8 R2) gives the result- Default Server: Unknown
nslookup from a client pc gives - Server Unknown, Address: ip address of the demoted server and the message "Unknown can't find computername: no response from server"
The DNS Role has been removed from the old dc but DNS on the new dc is still showing entries for the old dc (eg under DomainDNSZones & ForestDNSZones). This article http://support.microsoft.com/kb/216498 suggests running ntdsutil to clean up metadata but the article is written for W2K3 SP1 or lower and the new dc is W2K8. And the first section of the article also suggests that removing the old dc from Servers in AD Sites and Services will do the same thing on W2K8 anyway.
Can I remove the old dc from Sites and Services and remove the old dc entries from DNS? Or should I run metadata cleanup from ntdsutil? And most importantly I suppose, will this resolve the issues I am having?