Last updated: 2019-09-16

Source: https://support.freshservice.com/support/solutions/articles/50000000153-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 analyze 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.

Once you receive the error log please send an email to support@freshservice.com and one of our agents would assist you further on this.