We plan to demote a old Domain controller in 2003. it was our primary DC as served us more than 5 years.
Before we demote it, we want to make sure everything got transfer over, such as FSMO role, DHCP, etc..
For DNS, since we don't want to spend so much time on updating every host's DNS setting, how can we it up to forward all the DNS requests that go to the old one redirect to one of the existing DC/DNS server. setup a DNS forwarder? on the old one or the new
one? what other things we need to pay attention to when we do that.