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Activate the Duo Mobile app Using Cornell's Self-Service Website

Use this process if you need to activate Duo Mobile and don't have a current active Duo method

This article applies to: Two-Step Login

Use the instructions below if you can't complete Two-Step Login (Duo) authentication because: 

  • you have not yet activated the Duo Mobile app on your smartphone, but have used your smartphone for the Phone Call or SMS Passcode methods; or
  • you are replacing your smartphone with another that uses the same telephone number.

To use the self-service process to activate Duo Mobile:

  1. Go to https://recover.netid.cornell.edu/ — or, from the Manage Your NetID page, select Can’t Use Duo? Re-activate Duo Mobile.

  2. Type your Cornell NetID into the NetID field, then select Submit.

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  3. Select Recover Duo.

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  4. On the Verification required screen, select Continue.

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  5. If you have previously provided a recovery email address, a one-time code will be sent to that address. Type the code sent to you into the One-Time code field, then select Continue. 
If you don’t immediately see the recovery email, check your Junk or Spam folder. If you have not set up a recovery email address, you will need to answer a series of security questions to prove your identity.
  1. Log in using your Cornell NetID and password.

  2. Choose a mobile device from the drop-down list, then select Activate. 

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  3. Follow one of the two sets of on-screen instructions to install (if not already installed) and activate Duo Mobile on your smartphone.

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  4. The webpage will confirm that you have activated Duo Mobile on the device.

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