I got it working on a local set up. It turned out that my biggest issue was figuring out my proper LDAP login and the LDAP search strings. I had to get the search string information from our IT department. Once I told it the correct login, it worked well.
My ldap-config.php looks something like:
<?php
// original $ldap_search_strings = array( 'uid=USERNAME,ou=lala,ou=www,dc=example,dc=com', 'uid=USERNAME,ou=lala2,ou=www,dc=example,dc=com' );
$ldap_search_strings = array('CN=USERNAME,OU=Users,OU=Department1,OU=CompanyName,DC=intranet,DC=CompanyName,DC=com',
'CN=USERNAME,OU=Users,OU=Department12,OU=CompanyName,DC=intranet,DC=CompanyName,DC=com');
$ldap_hostname = 'ldap://SERVER_IP'; // use ldap:// for non ssl encrypted servers
$ldap_port = 389; // use 389 for non ssl encrypted servers
?>