For the best experience, enroll in MFA via the Duo app on your smartphone or another smart device with a push notification. A push notification is a pop-up sent from an app that you "push" from your phone or another smart device when you authenticate with Duo. To enroll via push visit: Enroll Via Push Notification.
If you cannot receive a push notification, do not have a smartphone, or do not wish to use the Duo Mobile app, visit Which Devices Should I Enroll in MFA with Duo?
We recommend that you register a second device in Duo as a backup authentication method in case your primary method is not available.
Duo Introduction Video
Using the Duo App
Do you have a replacement cell phone or device?
Enroll your replacement smartphone or device in MFA with Duo using these instructions.