Last updated: 2017-07-20

Source: https://support.freshdesk.com/support/solutions/articles/225343-why-am-i-getting-a-login-unsuccessful-error-on-the-ad-sso-

This error message denoting authentication failure would be because of an error in setting up the SSO. To analyse this, we would require the debug log. Please enter ?debug=1 at the end of the URL that is generated, to retrieve the debug log .

Also, please check the constructed URL after the login, to see if the Hash is generated or not.

If the issue persists, please send an email to support@freshdesk.com.