Two data structures of user entries for an LDAP directory server exist: the hierarchical structure model and the flat model.
When performing user authentication on an LDAP directory server, verify which data structure is being used, because information about the LDAP directory server registered on the management server and the procedures you need to perform on the management server depend on the data structure.
In addition, when performing user authentication or authorization on an LDAP directory server, also verify BaseDN, which is the start point for searching for users.