Views:

This is a product limitation.

LDAP SSL uses ports 3269 and 636 but IMSS Windows does not support LDAP SSL. The table shows the ports used by LDAP and LDAP SSL services/protocols:

Service NameUDPTCP
LDAPNone389
LDAP SSLNone636
Global Catalog LDAPNone3268
Global Catalog LDAP SSLNone3269

For more information about Active Directory and how it works, refer to the Microsoft article How Active Directory Searches Work.