Server 2003 > 2008 R2 Migration
We currently have 1 main DC (running DHCP) and 2 backup DCís running DNS, all on server 2003.
We are looking to move everything over to 2008 R2.
I was going to build a 2008 server, add it to the domain, promote it to a DC and transfer the FSMO roles from our old main DC. I was then going to demote all the old DCís and remove their roles and add DHCP to the new server as a role. I was then going to add 2 more 2008R2 servers as backup DCís and make them DNS servers.
Is this the best way/order to go about things? Or will creating new DHCP/DNS servers play havoc across the network, bearing in mind the settings will be matched to how they were before (scope/reservations etc.)