Hi All, One of our exchange servers experienced a hardware failure this morning (excellent start to the week!), and as it was the main mailbox store, it caused a few hours of downtime for most of our users. To prevent this from happening again, I'd like to have a certain amount of redundancy. I understand that in a cluster of exchange servers this is possible as they effectively act as one logical exchange server. Is it possible to achieve the same level of redundancy without setting up a cluster, by synchronising the mailboxes between the two servers? Would a cluster be overkill for our two servers and 30 odd users? As part of an exchange cluster - would it be possible for the server to take on other tasks as an individual? If you could offer personal advice, or a recommendation of literature, that would be excellent. Cheers, Jason