Address Autocompletion in Thunderbird using UChicago LDAP Directory Server

I use Thunderbird for all my UChicago CS related email, one of the major pain points for me until recently was that there was no address autocompletion available there. Not that it is available on UChicago GMail either, but somehow that is tolerable. In this HOWTO, I document how to add LDAP directory search to Thunderbird (or any other desktop email client). Here are all the settings that you need for Thunderbird (Preferences → Composition → Addressing → Edit Directories… → Add Server):