Duo CA Bundle Update - February 2nd, 2026

Audience: Purdue faculty, staff, and students
Purpose: Help users understand the 2026 Duo CA Bundle Update

What's Changing?

Beginning February 2, 2026, Duo will require version 4.85.0 or higher of the Duo Mobile app in order to use the Duo Push (or Verified Push) authentication method.

Am I Affected?

If you are using a version of Duo Mobile that is older than 4.85, you will experience disruptions receiving push notifications in Duo.

Radius Applications

If a Purdue Radius application is set to use the host "mfarad" after this change, there will likely be issues accessing the application. In this event, please submit a ticket to Purdue IT for assistance migrating the application.

Checking Duo Mobile Version

iOS

  1. Open the Duo Mobile app on your iPhone.
  2. Select the three lines in the top left to open up the side menu in Duo.

Uploaded Image (Thumbnail)

Uploaded Image (Thumbnail)

The version will be listed at the bottom of the menu.

Android

To see which version of Duo Mobile is installed on your device:

  1. Go to the Android Settings menu.
  2. Tap Apps.
  3. Scroll down and tap Duo Mobile.
  4. The "App Info" screen shows the version.

What Should I Do?

Please update the Duo Mobile app on your phone as soon as possible to avoid disruption. Your Duo Mobile application version must be 4.85.x or higher. For iOS, find the latest version of Duo Mobile in the App Store. For Android, find the latest version of Duo Mobile in Google Play. Be sure to install the app published by Duo Security LLC. 

To download the app, you need to be running: 

Android 11 or later; for details, see Which versions of Android does Duo Mobile support? 

iOS 15 or later; for details, see Which versions of iOS does Duo Mobile support? 

If you are unable to update to the latest version of Duo Mobile, you can continue accessing your account by using a Duo Mobile passcode.  A Duo Mobile passcode can be found in the Duo Mobile app. To use a passcode: 

  1. In the Duo prompt, tap “Other options” and select Duo Mobile passcode.  
  2. Open the Duo Mobile application on your device.  
  3. Tap on your Purdue University account listed in the app to view a 6-digit passcode code. 
  4. Enter the 6-digit code during login to complete verification.

Alternatively, you can set up additional methods. Purdue IT recommends setting up at least two authentication methods.

Still Not Receiving Push Notifications?

Check App Notifications:

Ensure that notifications are enabled for Duo Mobile. On iOS, go to Settings > Duo Mobile > Notifications and make sure "Allow Notifications" is turned on. On Android, go to Settings > Apps > Duo Mobile > Notifications and ensure notifications are enabled. 

Network Connection:

Verify that your device is connected to a reliable Wi-Fi or cellular network. A weak connection can prevent notifications from being received. If you're having issues, try toggling Wi-Fi off and on or switching to cellular data. Confirm airplane mode is not on.

Pull to Refresh:

If you expect a notification but haven't received it, try pulling down on the screen in the Duo Mobile app to manually check for notifications. This action forces the app to reach out to the Duo cloud service directly.

Do Not Disturb Mode:

Check if your device is in Do Not Disturb mode, which can suppress notifications. Disable this mode if it's active. 

Reboot Your Device:

Restarting your phone can resolve background issues that may be preventing notifications from appearing.

Update Google Play Services (for Android users):

Ensure that Google Play Services is up to date, as outdated services can affect notification delivery.

Reinstall Duo Mobile:

If the problem persists, consider uninstalling and reinstalling the Duo Mobile app. This can help reset any settings that may be causing issues.

Check Background Data Settings (for Android users):

On Android, ensure that background data is enabled for Duo Mobile. Go to Settings > Apps > Duo Mobile > Data usage and check the settings. 
 

Questions can be directed to it@purdue.edu. Additional information on using Duo authentication with Purdue Login is available in the Purdue Knowledge Base: https://service.purdue.edu/TDClient/32/Purdue/KB/ArticleDet?ID=454

 

Still need help?  Click the 'Purdue IT Request' button to start a ticket.

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