Action required: Update Teams devices to a minimum app version ahead of the retirement of Exchange Web Services (EWS)

Update Microsoft Teams Rooms on Android, phones, and panels to the minimum app version released in February 2026 before October 2026 to avoid losing calendar functionality due to the retirement of Exchange Web Services (EWS). Devices below this version may lose calendar sync and one-touch join features. What and Why: This is a friendly reminder that Microsoft is retiring Exchange Web Services (EWS) in Exchange Online. Teams devices use EWS for calendar functionality, and Teams device applications have moved to a supported replacement since February 2026. Devices running an app version older than the minimum supported version released in February 2026 may lose calendar functionality starting October 2026. This notice applies to devices in the following categories that remain under active certification and support: Microsoft Teams Rooms on Android, Microsoft Teams phones, and Microsoft Teams panels. We recommend reviewing your device inventory now and updating any devices below the minimum app version before October 2026 to avoid disruption. Rollout Schedule: General Availability: We will begin rolling out in early October 2026 and expect to complete by late April 2027. Impact on Your Organization: Who is affected: Organizations with Microsoft Teams Rooms on Android, Microsoft Teams phones, or Microsoft Teams panels. Devices in these categories running an app version below the minimum supported version released in February 2026. Platforms/Services: Microsoft Teams Microsoft Teams Rooms on Android Microsoft Teams phones Microsoft Teams panels Exchange Online calendar functionality used by Teams devices What will happen: EWS will be disabled globally starting October 2026. The calendar of devices running an app version below the minimum listed below may lose functionality and fail to sync. Microsoft Teams Rooms on Android may not sync the room calendar, and one-touch join for scheduled meetings may not be available. Users can still join meetings by entering a meeting ID or joining from a personal device. Microsoft Teams phones may have a compromised Calendar app, and scheduled meetings may not be listed on the device home screen for one-touch join. Calling functionality is not affected. Microsoft Teams panels may not show room availability or upcoming meeting agendas outside the […]

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