Creating an LDAP contact list with simultaneous use of SSO

[Denyok89]

Everyone is welcome. How to make contact list generation work via LDAP and at the same time use the possibility of transparent domain authorization SSO. This combination works as follows:
auth_method:

#   - ldap
    - anonymous
anonymous_protocol: both

If ldap is not enabled, then the contact book is not formed. How can ldap be configured granularly to form contacts and anonymous for SSO.