ldap query failed

Hello everyone unable to pull users from active directory Common name : cn Distinguished name : DC=mydomain,DC=local Binary Type: Regular UserDN : CN=Administrator,CN=Users,DC=mydomain,DC=local when i test i get error ldap query failed. I created another user name Fortiadmin under Users container in Active directory and i gave the user enterprise admin rights When i try UserDN : CN=fortiadmin,CN=Users,DC=mydomain,DC=local Still same error please do guide me the correct syntax.