I tried to set up CUCM V7.1.3 with LDAP Auth. I configured the CUCM to use UPN as username. I used firstname.lastname@example.org in LDAP Manager Distinguished Name in LDAP Directory and the LDAP user Search base is dc=netlab,dc=loc. It works fine. However, when I set up LDAP Auth and try to use the same name email@example.com in LDAP manager Distinguished Name, it fail. I tried different names and change the LDAP port to 3268 base on some Cisco documentation. Nothing works.