All UW–Madison students and employees must update their Duo Mobile app to the latest version by March 31. After that deadline, older versions of the app will no longer work.
Update your mobile app today to keep your access to essential university systems, including your email, Canvas courses, Zoom meetings, timesheets and VPN.
What’s happening: Duo Security is ending support for older versions of its mobile app to improve security. After March 31, versions earlier than 4.85.0 will stop working for multifactor authentication at UW–Madison.
Update your Duo Mobile app
- Open the App Store (iPhone/iPad) or Play Store (Android)
- Search for “Duo Mobile”
- Select Update
- Wait for the download and installation to complete
- Open Duo Mobile to confirm it works
Download Duo Mobile for iOS & iPadOS Download Duo Mobile for Android
Troubleshooting
If the update won’t install
Your phone’s operating system may be too old. The latest Duo Mobile app version requires:
- iPhone & iPad: iOS/iPadOS 16.0 or newer
- Android: Android 12 or newer
To check your version:
- iPhone/iPad: Go to Settings, then General, then About, then iOS Version
- Android: Go to Settings, then About Phone, then Android Version
If your device is too old
You have three options:
- Use a different device — Install Duo Mobile on another smartphone or tablet that meets the requirements
- Create backup passcodes — Generate them before March 31 (Learn how to generate backup passcodes)
- Get a Duo security key fob — Request one from your Human Resources office, your local IT department or from the DoIT Help Desk
Frequently asked questions
Why is this happening?
Duo is ending support for older versions to improve security. Outdated versions won’t receive security updates and will have compatibility problems.
What happens if I don’t update?
After March 31, 2026, you won’t be able to log in to university systems that require multifactor authentication, including:
- Microsoft 365 apps
- Zoom
- Canvas courses
- HR and payroll systems
- VPN
You’ll need to use backup passcodes or a Duo security key fob instead.
How do I know if I need to update?
Open Duo Mobile and check your version:
- Tap Settings (gear icon)
- Look for “App Version”
- If it shows a version earlier than 4.85.0, update now
Note: Version numbers can be tricky. The number 4.102.0 is newer than 4.85.0 because you compare each section separately (4 = 4, then 102 > 85).
Can I keep using my current phone?
Yes, if your device can run at a minimum iOS 16.0 or Android 12. If not, use a different device or an alternative authentication method.
I updated — what’s next?
Nothing. You’re ready to go.
Need help?
Contact the DoIT Help Desk at help@doit.wisc.edu or 608-264-4357.