We are currently planning to install Exchange Server, moving from a LAN to a
WAN. Currently we use Exchange 5.5 SP3 with around 60 mailbox's. When we
move to the WAN, there will be 6 branches with between 20-40 new mailboxes
at each branch. Our WAN is based on frame relay, with pipes around 64K.
Would we be better off creating Exchange Servers at each branch that join
the site at our headoffice, with local users mailboxes on the appropriate
server, or run all the mailboxes from headoffice over the WAN. How much
bandwidth does an open Exchange mailbox take over a WAN/LAN? Any pointers as
to which is the best route to take and why. Currently we feel the server per
branch all connecting to head office would be better, but are being told by
our parent company that we should just use one Exchange Server (so that they
can also use it, adding more mailboxes over the WAN, probably in the
Any advice appreciated. We are also deploying a CRM solution that will
integrate heavily with Exchange (either Siebel or Pivatol). Also, would it
be better to deploy Exchange 2000 now, or deploy 5.5 for the WAN and upgrade
later next year......