Rated 5 out of 5 stars

When configured properly this gives access to the Zimbra address books. Using this add-on combined with IMAP and Lightning allows using Zimbra and Thunderbird as a full featured PIM very similar to Outlook and Exchange without the cost. Now when I swap out computers, I no longer lose users mail, calendar or contacts. Love this as a part of the suite I described.

This review is for a previous version of the add-on (0.8.38).