I'm looking for your thoughts on consolidating a 5 site Exchange deployment into a single fault tolerant site. Is this feasible? Is it just a bad idea?
Here are the details:
Site1: Hub site. 5mbps wan link ~200 Mailboxes <- This is where everything will be consolidated to.
Site2: 3Mbps WAN link ~200 Mailboxes
Site3: 3Mbps WAN link ~100 Mailboxes
Site4 and Site5: 1.5Mbps WAN link ~50 Mailboxes each
The server will be Exchange 2010 and all clients are using Outlook 2007 with cached mode. The WAN bandwidth profile for each of the sites is currently somewhat minimal (with the exception of the T1 only sites). I guess my main concerns are bandwidth and the whole "all your eggs in one basket" thing. What are your experiences with this configuration?