When 2-Factor Authentication has been enabled with your SSO user, you can to use the Mobile APP for authentication.
Choose your mobile operation system and insert your phone number to receive link for download, or go to App Store (Apple) or Google Play (Android).
Here you can manually search for Authy and download to your phone.
Open the App on your phone and you will be prompted to set up the device into a secure token:
Enter your country code and phone number, and you will be prompted with options on how to verify your device:
Choose your preferred method to validate your device:
If you choose SMS you will receive the SMS (only to mobile phone, not to users with landline registered numbers) with a link you can press or manually type in the Registration Code:
If you choose to validate via Phone call, the app will display a 2 digit code that you will need to give back via the phone. You will receive the call after 30 seconds.
The App is now ready for use and will look like this: