Yellow Bricks has the following blog : Converting Domain Controllers
Just noticed this great VMware KB article. The article deals about converting aka p2v’ing Microsoft Domain Controllers. Those of you who have done VMware implementations and migrations know that this usually causes problems and leaves the Active Directory in a faulty state. This will lead to replication not working properly anymore. My advise usually is: Create a new VM from a template and do a “dcpromo”, best solution to also get rid of the slack. Or do a “cold migration”, no and I repeat NO hot migration. This will kill your replication for sure. Anyway, read this KB Article for more info.
Basically, do a Cold Migration