Microsoft 365 Alert – Service Degradation – Microsoft Teams – Users may see higher battery and CPU usage in Microsoft Teams calls when participants screenshare or share video – RESOLVED

Announcements Arpan Das

05/01/2026 08:39:00 AM

NHSmail Reference: INC46716095

Microsoft Reference: TM1212913

Issue Status: RESOLVED

Issue Description: Users may see higher battery and CPU usage in Microsoft Teams calls when participants screenshare or share video

More info: Microsoft Teams users on Windows may see higher battery and CPU usage when viewing a screenshare or video from other participants, which can lead to increased battery drain as more participants share video. This issue only impacts the Microsoft Teams desktop client on Windows.

Final Update: 15/01/2026 09:12:00 AM – The deployment of the fix completed to the affected portion of infrastructure and Microsoft has confirmed in their telemetry that the impact is remediated.

Scope of impact: Any user may be impacted by this event and may see higher battery and CPU usage in Microsoft Teams calls when participants screenshare or share video.

Root cause: A recent routine Microsoft Teams update contained a code issue, leading to higher battery and CPU usage in Microsoft Teams calls.

Next Steps: Microsoft are reviewing their update procedures to develop better methods of detecting and preventing similar code issues from occurring in the future.