Unknown authentication error
When you are performing an authentication-related operation such as adding, editing, deleting, or testing remote users or groups, the following error message might be displayed:
Unknown authentication error.
This problem can occur if you have set an incorrect value for the following options:
Administrator Name of the Active Directory authentication service
Bind Distinguished Name of the OpenLDAP authentication service
In the left navigation pane, click General > Remote Authentication.
Based on the authentication service that you have selected, enter the appropriate information for Administrator Name or Bind Distinguished Name.
Click Test Authentication to test the authentication with the details that you specified.