Rated 3 out of 5 stars

Correction:

Sogo connector almost works... Only the last EMAIL entry gets synced to the thunderbird address book:

http://www.sogo.nu/bugs/view.php?id=2570

I'm waiting for this bug to be resolved before I upgrade Thunderbird. For now I'm sticking with Thunderbird 17.0.11 ESR that works with Zindus until this bug is resolved

Rated 4 out of 5 stars

I've tested this extension with Zimbra and it works fine, SOGo Connector Thunderbird extension:

http://www.sogo.nu/downloads/frontends.html

The connector uses cardDav