Microsoft 365 Alert – Service Degradation – Microsoft Teams – Users may be unable to initiate screen sharing in 1:1 calls using the Microsoft Teams web client – ONGOING

Announcements Arpan Das

21/04/2026 08:33:00 AM

NHSmail Reference: INC46804402

Microsoft Reference: TM1286033

Issue Status: ONGOING

Issue Description: Users may be unable to initiate screen sharing in 1:1 calls using the Microsoft Teams web client.

More info: Specifically, only the first screen sharing session works; subsequent screen-sharing attempts may not be visible.

While Microsoft are working to remediate this issue, affected users can still perform screen sharing by:

– Using the desktop or mobile apps
– Adding another user to the call
– Ending and restarting the call

Current Update: 19/05/2026 08:38:00 AM– Microsoft are monitoring the rollout of our solution, and they will provide an update on their fix deployment timeline and for when impact will be remediated once they are available.

Scope of impact: Any user initiating a second screen sharing session within a 1:1 call using the Microsoft Teams web client may be affected.

Next update by: Tuesday, May 19, 2026, at 6:00 PM UTC