Microsoft 365 Alert – Service Degradation – Microsoft Teams – Users may encounter intermittent failures when attempting to create shared and private channels in Microsoft Teams – RESOLVED

16/12/2025 09:23:00 AM

NHSmail Reference: INC46706480

Microsoft Reference: TM1197326

Issue Status: RESOLVED

Issue Description: Users may encounter intermittent failures when attempting to create shared and private channels in Microsoft Teams.

More info: This specifically impacts semantic models without an owner, where email notifications for refresh, success or failure are not being sent. As a workaround, any user with the contributor role can take over the ownership, which will allow the email notifications to be sent.

Final Update: 17/12/2025 08:45:00 AM – Microsoft have identified that a portion of infrastructure responsible for processing requests to create shared and private channels in Microsoft Teams is performing below the expected service threshold. They have implemented some changes to improve the request processing time and are monitoring the changes to validate that the impact remediates.

Scope of impact: Some users attempting to create shared channels or private channels in Microsoft Teams may be intermittently impacted. This information may be updated as our investigation continues.

Root cause: A portion of infrastructure responsible for processing requests to create shared and private channels in Microsoft Teams is performing below the expected service threshold, causing impact.

Next Steps: Microsoft are continuing to monitor the affected infrastructure closely to gain further insight into the source of the underlying issue and identify ways they can better prevent similar impact in the future.