The information in this thread refers to Zimbra 5 RC2.
I have discovered something that you may or may not know the answer to. The "view mail" option in the admin interface (very useful option by the way) no longer functions properly for me. I don't know the exact cause, but the most recent thing I did that may have altered it was execute some curl commands to import calendars from another Zimbra install as mentioned here.
It is still possible to log in to the user accounts manually, but in the interests of speed, I need to be able to just see the mail to check if boxes have migrated properly.
Any information on this would be most appreciated.