We wish to upgrade our bleeding Exchange server 2003 to 2010 and our DC’s to 2008 R2 on our 3 site locations.
My main concern lies in the correct order to perform the upgrades/migration.
We have a new SAN up and running, so I would image a fleet of new installation for the DC’s and Exchange followed
by a migration – but in what order?
Site 1 (HQ-CPH) contains 2 DC running 2003 R2, 1 DC running 2008, 1 Exchange 2003
Site 2 (Branch-STHLM) contains 1 DC running 2008 and fileservers.
Site 3 (Recovery-CPH) contains 1 DC running 2003 R2 and fileservers.