Enter the following values
Hostname: clearhost.example.org (replace with your COS hostname)
Base DN: dc=example,dc=com (replace with Base DN value from COS control panel under Directory–>Domain and LDAP)
Click OK and choose the “ldap” server from the list.
Peter wrote: The Thunderbird on my Fedora system only supported TLS on port 389, but not SSL on port 636. Wah? It's 2014! The only way I could get Thunderbird to work was using an unencrypted connection (which is disabled in ClearOS by default).
In /etc/sysconfig/ldap, uncomment and configure the following parameter:
Change the 192.168.1.1 IP to whatever IP is needed for tikisuite.org and then restart LDAP:
service slapd restart
2014-03-03: Marc confirms this worked.
And later Peter wrote: “After implementing SSL certificates in OpenLDAP properly (this too will be a ClearOS update), Thunderbird was able to connect to the LDAP server using SSL.”