I've read several posts on changing IP addresses on DCs within the same subnet but just want to make sure I'm on the right page. We have three DCs (2 in our 192.168.0.x office and 1 in our 192.168.1.x address) and are moving our DC with all of the FSMO roles from our 192.168.0.x office to our 192.168.1.x office which can both see each other through the VPN.
Based on my reading it sounds like all I need to do is change the DC from 192.168.0.x. to 192.168.1.x then shut it down, move it to the other office, bring it back online and change DNS entries as necessary. Once complete I use Active Directory Sites and Services to make sure the DCs can replicate connections. Sound right?