I support two companies that share the same 2003 R2 domain we will call company A and B. My task is to make company B standalone in a mixed 2003 and 2008 domain. Company B (20 users) will have it own 2007 Exchange server (currently shared 2003) DNS, MX record and everything else normally running in a domain. I am considering a couple of different scenarios to make this happen. I have five new servers and three old 2003 servers to work with. My thought is to take one of the new servers and create a separate Forest/Domain on that system with the normal roles. The remaining servers would built into the shared domain and when the circuit is ready tehy would be transferred into the new domain. I am having some doubt now that this method would be the smoothest. What I am trying to do is kept the same route/switch/ip addressing setup. So what would you recommend?