We recently discovered the need to remotely backup our Exchange mailboxes to another LAN. The question is, are there any Open Source (or a way to program it in .NET or something) applications to do differential backups on the mail items themselves? Or, is there software that will look at a file (the mailbox store) and only backup those bytes that have changed?
We're trying to avoid purchasing Veritas and the Exchange module for each server.
Thanks in advance!