I'm toying with the idea of changing our zimbra test box with 4 users from Fedora Core 3 to CentOS 4.2.

For that number of users, I could just copy mail out via IMAP and export contacts. I would miss calendar data though.

I'm currently backing up by stopping zimbra and archiving all of /opt/zimbra

I imagine that restoring /opt/zimbra on a different OS (same ip and hostname) would be asking for trouble?

What directories should I be restoring for just user and settings data?