Para quem ainda não consegui ou não pode instalar o OpenLdap e quer usar o catalago de endereços no Thunderbird vai uma boa dica
Referencia: howtoforge
Integrate Thunderbird with Active Directory
To integrate Thunderbird to the AD, you must already have installed and configured Kerberos and Samba so that you can use the net ads to obtain the information you need. There are a lot of documentation out there to get to that point. I will just highlight the main points for the sake of completeness.
