Ok

quite a process to get everyones mail in the company imported as everyone is on Outlook 2010.
Starting to see way to many bugs with Zimbra at the moment

Really thought I would be able to use this as a solution but it's way to tempremental.
Webmail stops working and says connection not possible, have to reset the service every so often. Outlook connection to IMAP just hangs and then says disconnected, need to restart the services for it to work.
Trying to log into the admin portal and it sits 'hanging' on 'Loading' have to killall -HUP java
I wanted to buy 2 licenses now for quite a few users and have a fail over solution but if Zimbra is this unstable from the world 'install' I guess I am going to have to rather spend that money on Exchange 2010 licenses.