Small problem with a Windows 2003 server running DHCP. I recently needed to remove one of the two Domain Controllers in this network. The DHCP server on the remaining Domain Controller was originally configured to assign both itself and the other DC as DNS servers with the other DC as the primary DNS server.
I've reconfigured the DHCP scope, removing the old DC as the primary DNS server but about 50% of the time on boot the client PC's seem to still set it as the primary DNS server.
I have not rebuilt the DHCP scope from scratch as there are multiple reservations and I'd prefer not to have to do this but I'm at a loss for where the client PC's are pulling the old DC as the primary DNS server from.
How can I resolve this issue?