I have the following Exchange 2003 setup:
1 backend EXG 2003 server, about 300 mailboxes, installed on a 2 node MS clister running Windows 2003.
2 frontend EXG 2003 servers, accessable via the internet to provide OWA and mobile device access. Both are set in a Windows Load Balancing and seen as one node.
I would like to move to EXG 2010 and need to know the following:
1. which server roles are required to replace the existing servers
2. I also need to have DR based on a diffrenet site that is connected to the main one over WAN