As we move to migrate to the 4.5 edition of the Zimbra Collaboration Suite, an issue has been brought to our attention we feel you should be aware of prior to the January 26 deployment.
Dear Zimbra Mobile Users:
After upgrading, devices will get an error on a sync attempt. This is expected, so you'll want to have everyone perform a resync post upgrade.
Consult:
http://wiki.zimbra.com/index.php?title=Moble_Device_Setup#Resetting_your_device
If you need more information.
In addition, we will offer additional instructions as needed after the migration to 4.5.
Best regards,
The Sonoma IT Team