I'd like to move our Exchange 2007 Server, (Mailbox, Client Access, Hub Transport, Unified Messaging) to new hardware. I anticipate doing a fresh install on the new hardware and then moving the roles and mailboxes. I'd then need to delete the old server from the Exchange topology / AD. Can someone point me to docuemntation that would describe doing this? Thanks!

Here is a good place to start: http://technet.microsoft.com/en-us/library/bb310767.aspx The basic process is going to be to add in the new Exchange 2007 server with all the required roles; than move data & redirect client requests; than decommission the old server.