Problems to authenticate against an Azure AD -Ldap

Hi folks, i hopw you can help after reading thousends articles and making  hundred of  trials with the freeradius with no succes. Here ist the situation, we have an Azure AD and  for this an ldap server front-end. So i could connect to the AD over the ldap. for testing reason i implementet an Local openldap server and testet ist with the eapol test and it works without problems, but if i change the ldap connection to the azure/ldap i got the following error: 5) ldap_khs: WARNING: No "known good" password added. Ensure the admin user has permission to read the password attribute (5) ldap_khs: WARNING: PAP authentication will *NOT* work with Active Directory (if that is what you were trying to configure) regards Uwe