Duo multi-factor authentication - Enroll and set up with phone number

Go to the Duo multi-factor authentication enrollment website (https://duo.colorado.edu) and sign in with your IdentiKey username and password.

If you have already enrolled in Duo, you will be prompted to authenticate and taken to a screen similar to the one pictured. Select return to the Duo device registration and management page to verify your information is correct (skip to step 7).

Click Start setup and select your authentication method:

• Duo Mobile: Get a push notification from an app on your smartphone or smart watch.
• Security key: Use a Yubi Key to verify your identity. 
• Phone number: Receive a phone call or text message with a code that you will need to enter.

OIT recommends using the Duo mobile app if you have a smartphone for the best experience, but you can enroll a cell or landline phone, a security key, or iOS/Android tablets. You may want to enroll more than one device for ease of access in case you lose or upgrade a device. 

After selecting Phone number, select your country from the drop-down list then enter your phone number. Use the number of your smartphone, landline, or cell phone that you're most likely to have with you when logging in to a Duo-protected service. You will be able to enter an extension if you select the Landline checkbox.

Verify your phone number is correct and click Yes, it's correct.

You will see a confirmation page that your phone number has been added. Click continue. 

After initial set up, when you're prompted to authenticate, click Other options on the authentication screen to change your preferred authentication option or verify the settings of a previously enrolled device. 

Depending on the devices you've set up, you will have several options for authentication. To verify or change authentication methods, click Manage devices (you will be prompted to authenticate before you can change any settings). 

The devices page will load, allowing you to add a new device or edit a device that's already set up. Click back to login or close the browser to exit.