When I try to add a secure Active Directory (Windows 2008 R2) users source ZCM returns an error :

Unable to obtain a valid certificate for SSL communications using the provided connection information. Please verify that the address and port are correct and that the LDAP directory has been configured with a valid certificate.

If use non-secure connexion it is working

The DC has a valid certificate and we can log to it unsing LDAP tools SSL.

Thanks in advance.