Setting Up Duo Mobile App on Your Mobile Device

This article covers how faculty and staff can set up the Duo app on their mobile device to receive push notifications to authenticate with Duo two-factor authentication. It also includes the extra steps you need to take if you have already set up Duo Mobile on another device or you have multiple campus accounts associated with Duo (e.g., you have both a faculty/staff account and a student account or you manage administrative accounts such as historydepartment@fullerton.edu).

These instructions show setting up an Apple iPhone, but the instructions are similar for other devices.

1. Download and install the Duo Mobile app from the Apple App Store or Google Play Store on your mobile device.

Duo Mobile app

2. Open a web browser on a computer or laptop to the CSUF Duo Setup site.

You will need to take a picture of a QR code with your mobile device as part of this process, so you can't use your mobile device to access the CSUF Duo Setup app.

Open your web browser to the CSUF Duo Setup site.

3. Enter your campus username and password. Check the I'm not a robot box. Then click Login.

If you want to set up Duo Mobile for an administrative account (e.g., historydepartment@fullerton.edu), you should enter the username and password for the administrative account.

login to duo account
  1. Enter your campus username and password. This is the same information you use to log in to the campus portal.
  2. Place a checkmark next to I'm not a robot.
  3. Click Login.

4. Click My Settings & Devices.

You do not need to choose an authentication method on this screen, however you will need to do it on the next screen.

access my settings

5. Choose the device you want to use to authenticate (if applicable). Then click Duo Push, Call Me, or Enter a Passcode.

authenticate
  1. If you have multiple devices in Duo, use the drop-down menu to select which device you want to use to authenticate.
  2. Click Send me a Push to get a push notification from the Duo Mobile app.
  3. Click Call Me and you will receive a phone call from Duo with instructions on how to authenticate (normally just press a number on your phone's dial pad).
  4. Click Enter a Passcode to get a text with a verification code.

5.1. Option D: After clicking Enter a Passcode, click Text me new codes. Then enter the code and click Log In.

text code
  1. Click Text me new codes.
  2. Enter the code you receive in the verification code field.
  3. Then click Log In.

6. Click on Device Options next to your mobile device.

my settings

7. Click Activate Duo Mobile.

If you have set up Duo Mobile on another device, this button will be labeled as Reactivate Duo Mobile.

activate duo mobile

8. Are you seeing a message that says Verify Ownership?

View instructions on verifying ownership of a phone number/device

The Verify Ownership message appears when your phone number is already associated with an account in Duo. For example, if you are both staff and a student, you can link both your faculty/staff Duo account and your student Duo account with the same phone number. Or if you manage an administrative account (e.g., historydepartment@fullerton.edu), you can link both your individual Duo account (e.g., tuffytitan@fullerton.edu) and the administrative account to the same phone number.

If you are not aware of your phone number being associated with another Duo account, immediately contact the IT Help Desk at helpdesk@fullerton.edu or 657-278-7777.

1. Click either Call me or Text me to verify your ownership of the phone number.

verify ownership screen
  1. Click Call Me and you will receive a phone call from Duo with instructions on how to authenticate (normally just press a number on your phone's dial pad).
  2. Click Text me to get a text with a verification code.

2. If you choose to get a text message, enter the verification code you receive and then click Verify.

enter verification code
  1. Enter the verification code you receive via text.
  2. Then click Verify.

3. Click Continue.

verification complete

9. Choose the type of device from the list and click Continue.

phone type

10. Click I have Duo Mobile Installed.

install Duo Mobile

11. You will see a QR code that you will scan with the Duo Mobile app on your device.

Prefer an email? Click Email me an activation link instead.

qr code

12. Open the Duo Mobile app on your device. Tap either Add Account or the plus sign icon at the top.

If you have already set up Duo Mobile for another account, you can still use the plus sign icon to add a new account.

duo app add account
  1. Tap Add Account.
  2. Or tap the plus sign icon at the top right.

13. Tap OK to allow Duo Mobile to access the camera if prompted.

allow camera access

14. Hold your device up to the laptop/computer screen to scan the QR code.

register device

15. Duo is now connected to your mobile device.

Notice that another way you can use your mobile device with Duo is to generate a passcode.

Duo account with passcode

16. On your computer/laptop, click Continue to save your changes.

continue setup

17. You're done! When you are prompted to authenticate with Duo, you can now choose to receive a push notification to this device.

successfully added

18. Want to automatically receive a Duo push? Click on the When I log in drop-down menu and select Automatically send this device a Duo Push. Then click Save.

You will still have the option of authenticating with another device; this feature simply makes the process faster if you usually use the same device to authenticate.

automatic duo push
  1. Click on the When I log in drop-down menu.
  2. Select Automatically send this device a Duo Push.
  3. Then click Save.

Need More Help?

Contact the IT Help Desk at helpdesk@fullerton.edu or 657-278-7777.