Hopefully this will be an easy question to answer: We have a small network with a small Exchange user base (150 mailboxes). We have several sites however, and would like to configure our network so that whichever site you're at, that's the exchange server (2003 SP2 Ent) you're using for your mailbox. The other reason, is that we don't want something like a downed T1 line to prevent users from accessing their e-mail. We already have this with our files (Using FRS), but from what I can tell, Exchange doesn't allow you to replcate the private information store to other servers. What are my options here? I've already explored OWA, and RPC/HTTPS, which work great, but don't satisfy the high availability requirement.