We have a 2003 DC that I want to virtualize as the lease on the hardware is expiring.
It's a DC, GC, FSMO master, DNS, DHCP and TS License Server.
I want/need to keep the same name and IP on the new box, and my plan right now is:
Build the new box and add to the domain with temp name/IP, patch etc. then dcpromo and make it a DC.
Sit back and wait for things to replicate.
Transfer FSMO roles, install DHCP and migrate/configure scopes, authorize new server, de-authorize existing server so now this one is our DHCP server.
De-Activate TS Licensing on current DC.
DCPromo current DC and demote, change name and IP and force replication amongst remaining DC's.
Rename new DC to name of existing DC, reboot, force sync etc.
Change IP of newly renamed DC to required IP, force replication.
Install TS Licensing role and install/activate TS CALs.
Hopefully sit back and admire my new DC with the same name and IP of the old hardware.