Microsoft Teams: Update the Teams mobile app to maintain Calendar functionality

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Major Update: This post contains a significant change that may impact your organisation.

What and why

To ensure continued access to Calendar functionality in Microsoft Teams mobile, users must update the Teams mobile app to the latest version. This change helps maintain a reliable calendar experience on iOS and Android devices and ensures compatibility with ongoing Teams service updates.

Rollout schedule

• Worldwide, GCC, GCC High, and DoD: Beginning late October 2026 and expected to complete late October 2026

Impact on your organization

Who is affected

• All users who access Microsoft Teams from iOS or Android mobile devices

Platforms and services

• Microsoft Teams
• Teams mobile app for iOS
• Teams mobile app for Android

What will happen

• Users who are not running the latest version of the Microsoft Teams mobile app will not be able to access Calendar functionality in Teams mobile.
• Users must update to the latest Teams mobile app version available in the Apple App Store or Google Play Store to continue using Calendar functionality in Teams mobile.
• This change applies only to the Teams mobile app.
• No changes are being made to Teams Calendar functionality on web or desktop clients.

Action required and recommendations

Action required.

Complete the following before late October 2026:

• Confirm that users are running the latest Microsoft Teams mobile app version available in the Apple App Store or Google Play Store.
• Inform users that Calendar functionality in Teams mobile requires the latest app version and may not be available on older app versions.
• Encourage users to enable automatic app updates on their mobile devices.
• For managed devices, verify that mobile application management solutions are configured to deploy the latest Teams mobile app version.
• Communicate this change to mobile users and support teams.

Learn more

• Deprecation of Exchange Web Services in Exchange Online | Clients and mobile in Exchange Online | Exchange Online | Microsoft Learn

Compliance considerations

No compliance considerations identified. Review as appropriate for your organization.