Use this to set the default network authentication server.
When you log into Setting mode (Web version) or send a print job to the machine using user information that is not registered in the machine, the authentication server is not known. This setting is used to select one of the LDAP servers registered in the machine as the authentication server.
When login is performed by network authentication using user information that is not registered in the machine, the login user will be the "User" registered as factory default. For more information, see "Users stored as factory default".