Hi We are in design phase to migrate our organisation to Ms Exchange 2007 (from Ex 2003), We want to consolidate remote sites. Except for bandwide and user profile, there are other factors that bear in mind for an accurate design? likenumber (minimum) of usersper site...?? for a site with 450 Users , is it a local server needed here? Thanks

there are many things to consider where you should have a local Exchange server or not.Bandwith, how much mailtraffic are clients generating, client version(cached mode), user expectation, disaster & recovery situations, backup/restore times, where are the Exchange expert located, putting all mailboxes in one datacenter, political is just some things that cross my mind.