Can't use AD as an LDAP server in LDAPv3 plugin

Summary: Lion Server won't query an LDAP server an allow me to login. I am using Active Directory as an LDAP server in our DMZ, because we don't want Lion to create a computer account on AD while in the DMZ.

Steps to Reproduce: Add an LDAP server using the LDAPv3 plugin, and add the custom mappings.

Expected Results: We expected that by adding the LDAP server using the LDAPv3 plugin we would be able to import user accounts for use with the different Lion services (profile manager to be specific). We added our LDAP config, which is powered by AD, and set the mappings, but we don't get results.

Actual Results: When we try to import accounts in Lion Server we don't get results. We did a packet capture, and we see that it is querying the LDAP server, and getting results, but the software is not displaying them. We also tried logging in as a network user at the login screen, but it shakes when we try to and acts like we were not entering valid credentials.