SMS can be used to as an authentication (2FA) method in two-factor authentication.

  1. To enable an SMS account for 2FA, when configuring your SMS service, select Two factor authentication under Usage.
  2. Navigate to Setup > Access and click Two Factor Authentication.
  3. In the Two Factor Authentication screen, select Text message (SMS) under Authentication Method and confirm the message content. In the SMS Account drop-down, select the SMS account you configured above.
     
  4. Click Finish.
  5. When somebody logs in, they will receive an SMS message with a security code. 

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