In the end, this is the element we needed to add to our apache config. On ubuntu, we dropped this into the site-specific configuration file in /etc/apache2/sites-available.
In the above example, I created a user specifically for apache, with password PASSWORD. I highly recommend using JXplorer to verify your bind credentials.
When configuring JXplorer, if you are using ActiveDirectory, most likely you'll need a Base DN as well. This was "DC=foo,DC=com". The user name is the exact string from above, same with password.
The AuthLDAPURL is a query that will be used to grab the entry associated with the username that the user types in when prompted by the browser. In the example above, it will search within DC=foo,DC=com against the attribute "sAMAccountName".
I hope this helps people out.