Yes. Duo supports several methods. Also see How Many Devices/Factors Should I Enroll?

If you temporarily misplaced, broke, or otherwise can't use your 2FA device to authenticate:

1. Use your additional enrolled device, if applicable.
2. Otherwise, you must call 4Help at 540-231-4357 to get a bypass code. Bypass codes are not given online or by email.

When outside of the continental United States, 4Help highly recommends Authenticating with a Passcode from Duo App, using Backup codes from the Virginia Tech Website, or using a previously enrolled method.*

(If you do not have access to any method of authenticating with a second factor, follow the instructions at Lost, Forgot, Broke, or Unavailable 2-Factor Device.)

If you anticipate needing to authenticate without internet or cellular service in the future, 4Help advises doing at least one of the following when you are on campus:

• Install the Duo Mobile app by following the instructions at Duo Mobile.
  • Anytime you are without internet or cellular connectivity, you can start the Duo Mobile app and generate a passcode by following the instructions at Duo Mobile Passcode. Even with your smartphone or tablet in airplane mode, you can start the Duo Mobile app and generate passcodes.
• Save (or write down on a piece of paper) a list of 10 codes generated by following the instructions at Print Passcodes from Virginia Tech Web Site.

Occasionally, you may experience connectivity issues such as not receiving Duo Push notifications or timeout errors. This problem is often resolved by refreshing the Duo Mobile app. To do that, click the circular arrow in the upper right corner of the app.

Go to the Duo Security Status webpage, and look for any interruption of service. If that webpage does not list any issues, then one of these conditions may be causing the problem:

• You have a firewall installed on your device preventing your browsers from reaching Duo.
• You have Parental Controls or other restrictions on your device preventing your browsers from reaching Duo.

If you have difficulty correcting these issues, contact 4Help by clicking Get Help at the top of this page or at http://4help.vt.edu.

The currently supported browsers can be found on the supported browsers page.

1. Open a new Chrome incognito / Edge inPrivate / Firefox private window.
2. When logging into a Virginia Tech 2FA protected website, enter username/password normally.
3. When the Duo screen is presented, click on Other options.
4. At the bottom, click on Manage Devices.
5. Complete the authentication with your second factor to proceed.
6. Follow the instructions in the Remove Device section on the Rename or Remove a Device page.

To activate Duo Mobile when you cannot get the QR code to scan, or when you only have access to a single screen or device, follow the instructions at Duo Mobile … search for “Reactivate Duo Mobile for an Existing Device

• If you have another *previously-enrolled* device, use that for Duo login and re-enroll the deleted account:
  
  
  1. In your browser, open a new Chrome incognito / Edge inPrivate / Firefox private window.
  2. When logging into a Virginia Tech 2FA protected website, enter username/password normally.
  3. When the Duo login screen is presented, click on Other options.
  4. On the ‘Other options to log in’ screen, at the bottom, click on Manage Devices.
  5. Use the Duo Manage Devices screen to delete the second factor that you accidentally deleted the account on by following the instructions at Rename or Remove a Device.
  6. Add that device to your Duo account by following the instructions at Add or Manage Devices After Enrollment.
  7. Note that if you are overseas, these steps may not work. For more information, see Authenticating without Internet, Network, or Cellular Service (International / Overseas).
• If you do not have any previously enrolled second factor devices:
  
  
  1. You must *call* 4Help at 540-231-4357 and ask for a bypass code over the phone, since bypass codes cannot be sent via email or web browser. You will be required to confirm your identity through a video call.
  2. Once you log in using the bypass code, enroll an additional device by following the instructions at Add or Manage Devices After Enrollment.
  3. To avoid this problem in the future, we strongly recommend enrolling at least two devices.

• If you have another *previously-enrolled* device, use that for Duo login and re-enroll the deleted device:
  
  
  1. In your browser, open a new Chrome incognito / Edge inPrivate / Firefox private window.
  2. When logging into a Virginia Tech 2FA protected website, enter username/password normally.
  3. When the Duo login screen is presented, click on Other options.
  4. Enroll the device by following the instructions at Add or Manage Devices After Enrollment.
  5. Please note that if you are overseas, the following steps may not work. For more information, see Authenticating without Internet, Network, or Cellular Service (International / Overseas).
• If you do not have any previously enrolled second factor devices:
  
  
  1. You must *call* 4Help at 540-231-4357 and ask for a bypass code.
  2. Once you log in using the bypass code, enroll an additional device by following the instructions at Add or Manage Devices After Enrollment.
  3. To avoid this problem in the future, we strongly recommend enrolling at least two devices.

At Virginia Tech, Enhanced 2FA means when a login request is sent to your Duo app, you’ll be prompted to enter a 3-digit code displayed on the device you’re logging in from. This ensures you don’t accidentally approve a fraudulent attempt.

When you log in, the device you're logging in from will display a 3-digit code. You’ll need to enter that code on your phone.

If someone else tries to log in as you, they'll see a code, but you won't. Without seeing the correct number, you can’t approve the request.

It’s quick and painless, and it protects you from accidentally letting someone else into your account.

Logging into a VT service, upon entering your username and password, you are presented with a 3-digit code to enter into your Duo app.  

On your phone, you will need to enter the number:

Token Distribution Guidelines for Departments

KB0015773 - Enhanced Two-Factor Authentication (E2FA) DoIT Token Distribution Guidelines for Departments 

DUO App Alternatives