Changed the IP address of our PDC (only server in the environment) from 192.168.30.10 this morning to 192.168.30.5
All seems well, DHCP is updated, clients can all connect... then suddenly no-one can log in (well, very, very slowly) nothing has changed on clients, but pinging the server resolves to the old IP address.
in DNS, Server > Forward Lookup Zones > DOMAIN.local, there is an "A" record for the server, with it's *OLD* IP address.
I reset it and all is well again - for a few minutes.
Every ten minutes or so (or instantly if I "reload" the zone) the old IP address re-appears.
I have did an ipconfig /flushdns then rebooted the server, searched the registry and replaced all occurences of the old IP with the new one, checked WINS - the only record I can find for the old IP address is the 1Ch DOmain Controller Record, which lists both the old and new addresses.
This is urgent, hence high points!