We might be migrating a Lotus Domino Server to Exchange 2003 and it might have to go over a WAN connection. I don't know my WAN connection speeds for T1, T3, Cable, DSL, whatever so I don't know how to judge minimum requirements for the WAN connection. Besides LAN specs, what would be an optimal WAN connection speed requirement for migrating email data from Notes to Exchange 2003?
Additionally, I know I can migrate about 1GB or data in about 20 to 30 minutes via a LAN. In your recommendation above please help me predict how fast 1GB would migrate over your recommended minimum LAN requirement.