I am trying to evaluate Zimbra as our successor to OCS and I have read through the docs, but I am still unsure of what level of redundancy/clustering Zimbra actually supports.
I know that Zimbra supports multi-server setup, which is where my user accounts get stored on different mailbox servers. Afaik, one can put a loadbalancer in front of those mailbox servers the mailbox servers will re-route the requests accordingly.
But what about IMAP?
Plus, wouldn't it make more sense to have a clusteres storage and have multiple mailbox servers accessing that storage?