I have a need to move from our old Zimbra server (4.0.1OSS) to a new Zimbra instance running 4.5NE. We are unable to just upgrade to the latest version - as I've tried it 3 times and each time I am forced to restore since the upgrade doesn't work.
So I'm going to transfer the accounts one domain at a time. imapsync should handle the email transfer, I just need to way to automatically export & import the contacts and export & import the calendars. I think the REST interface should be able to do this, I know it can import. Can someone point me to some info on how I might go about doing this?