Table of Contents
Summary
- Older versions of Microsoft Teams mobile apps will be retired, affecting users on iOS and Android devices running versions prior to release branch 2025Nov-T1.
- Users on outdated versions will lose access to the Walkie Talkie service.
- Upgraded authentication methods will only work on the supported version 2025Nov-T1 or later.
- Users need to ensure their apps are updated and can check their release branch in the app settings.
- Communication about this change is essential for users, and no additional admin configurations are needed.
Admin Impact: Low
User Impact: High
Release Start: 08 Feb 2026
Release End: 08 Feb 2026
Services: Teams
Category: Plan for change
Tags: User Adoption, Admin Action, Retirement
History
1/9/2026 Item Added to Message Center
Microsoft Message
Introduction
We’re retiring older versions of Microsoft Teams mobile apps to improve security and support a new authentication method for the Walkie Talkie service. To continue using Walkie Talkie, all iOS and Android devices must be updated to release branch 2025Nov-T1 or later.
When this will happen
This change will take place on February 8, 2026.
How this affects your organization
Who is affected: Users running Microsoft Teams mobile versions older than release branch 2025Nov-T1 on iOS or Android.
What will happen:
- Versions older than 2025Nov-T1 will be retired and no longer supported.
- Users on outdated versions will lose access to the Walkie Talkie service after February 8.
- The updated authentication method will only work on supported versions.
What you can do to prepare
- Ensure all iOS and Android devices are upgraded to release branch 2025Nov-T1 or later by February 8.
- Users can check their release branch by selecting their profile picture → Settings → About → Release branch.
- For iOS users, log out and log back in after upgrading to complete the update.
- Communicate this change to your users and update internal documentation.
- No admin configuration changes are required beyond notifying users and ensuring updates are complete.
Compliance considerations
No compliance considerations identified, review as appropriate for your organization.