Thunderbird GroupDAV plugin is a Mozilla Thunderbird extension that connects an address book to a GroupDAV server such as SOGo, OpenGroupware.org, or Citadel in order to synchronize contact information using the vCard format. It is compatible with both versions 1.5 and 2.0 of Thunderbird. License: GNU General Public License (GPL) Changes: The code was merged with the "GroupDAV Addressbook Connector" into a new extension called "SOGo Connector".

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