Duo mobile - choosing and using your authentication device

The recommended way to authenticate is to use the Duo mobile app. This article outlines the best way for you to do this.


Using the Duo Mobile app

Using Duo is quick and easy, and you can even use it if you don't have wifi or a mobile signal. Click here to watch a handy video overview of how to authenticate using the app.

Important: If you are experiencing any issues and require further assistance please refer to Duo two-factor authentication FAQs.

If you have not already enrolled for Duo two-factor authentication, do this first. You will need to be logged on to Office 365 to watch the video below, If you cannot see it here, view it directly on Microsoft Stream.

When you log on to a service that is protected by Duo two-factor authentication (eg Office 365), once you have entered your University username (+ the domain @leeds.ac.uk) and password as normal, the Duo authentication dialog box will appear. 

Screen shot of Duo prompt with two buttons 'Send me a Push' and 'Enter a Passcode'

Choose your authentication method by clicking on the 'Send me a Push' (a notification sent directly to the Duo app installed on your chosen device), or 'Enter a passcode' button. 

If you click 'Send me a Push' open the Duo Mobile app on your device, locate the notification and review the details. Then select 'Approve' or 'Deny'. Note the location information shown in the push notification may not be correct if your wifi connection is outside the University campus, as it depends on details provided by your wifi provider. 

Important: Duo Push notifications can occasionally take some time to come through. If this happens, please select the 'Enter a passcode' option instead. Passcodes do not require wifi / network connection. It is not a fault and should rectify itself by your next attempt.

If you have multiple devices, you can switch devices by selecting 'My settings & devices' from the menu and choosing your preferred device on the following screen.

Dialog box, Duo My Settings & Devices

If you click 'Enter a passcode' open the Duo Mobile app, and enter the displayed six digit number into the authentication dialog box.

Screenshot of Duo authentication prompt showing passcode text entry field 

Using passcodes via SMS text messages

You can also request a passcode to be sent via text message (SMS). From the authentication screen click 'Enter a passcode' (as above), then click 'Text me new codes'.

Important: Occasionally the blue box with the option to 'Text me new codes' may not display. It is best to use safari, chrome or edge browsers. If you still have issues please try removing your cache and cookies following these instructions and try again.

Duo will text five six-digit codes to your mobile phone, and a message will appear in the authentication box on your computer saying 'Successfully sent codes'. 

Upon receipt of your passcodes please follow the duo screen prompt when choosing which one to enter. See 'Your next SMS Passcode starts with 2' in the image below. 

Duo authentication prompt with message ' Succesfully sent codes' and Dismiss button

Click 'Dismiss' then enter the relevant code corresponding to the prompt into the passcode box, and click 'Log In'. 

You can use the remaining codes for future logins without needed to ask for a new set of codes each time. 

Important: If you receive new passcodes, these supersede previous codes. Each code can only be used once.

Hardware token

If you do not have a mobile phone or other device that is compatible with the Duo Mobile app, or can't receive SMS messages, please contact the IT Service Desk. Use a request form from the IT homepage to request a hardware token. If you do use a hardware token, you will need to type a passcode in each time you have to authenticate (rather than just clicking ‘approve’ in the Duo Mobile app). 

Important: If you are experiencing any issues and require further assistance please refer to 'Duo two-factor authentication FAQs' or 'I'm having trouble using the Duo mobile app'.

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