Contacts Extension is nice but not needed. In T'Bird's Address Book, go to New > LDAP Directory, and create one with a name that makes sense to you, the ip address of the Zimbra (or other LDAP) server, and this string in "Base DSN"
Quote:
|
ou=people; dc=yourdomain; dc=com
|
This would be for a yourdomain.com server. If it's .net then dc=net is what you put there.
Then you have to go into T'Bird's Tools > Options and choose the "Composition" button across the top. Under the "Addressing" tab, check the "Directory Server" checkbox and choose your named directory (as above) from the drop-down list.
You will not be able to browse the directory, but addresses will search or autocomplete.
Cheers,
Dan