I am planning a migration from SBS 2003 to Server 2012 Essentials R2 with NO EXCHANGE. I've been reading the Technet migration articles and the one step is to rejoin the existing computers after transferring the FSMO roles. This has me a little concerned because this is one of the reasons I want to migrate. I only have 5 users and 5 computers so if I have to disjoin and rejoin then there really is no sense for me to migrate because I would then have to recreate all the users profiles which will take longer than creating a new domain. Any help would be appreciated? Do I NEED to disjoin and rejoin each PC?