I am currently running exchange 2007 on a single 2003 box. I want to upgrade to server 2008, CCR. I want the current hard ware to be one of the 2008 boxes ( i know I can't directly upgrade to 2008) and use a virtual machine as the other node, and a virtual server as the client access and hub transport server. The main thing I am concerned about is transitioning the current box, and my current mail. All the articles I have read pretty much go from the assumption that you are doing this with a new domain, and new users. How do I install this and carry over all my mail?