I may not have the correct zone on this one...
Windows 2003 AD domain
Exchange 2003 servers in AD #1
BES 5.0.2 (soon to be 5.0.3) on one VM server
New / Additional Domain:
Windows 2008 R2 AD domain (no Exchange servers yet)
Eventually, Exchange 2010 servers will be brought online
There is a trust relationship between the two AD domains.
The hardware will not change, or the IP address. Just switching domains...