Microsoft 365 Alert – Service Degradation – Microsoft Teams – Some users encounter loading delays when opening the Microsoft Teams desktop client on Windows devices – ONGOING

04/09/2026 08:40:00 AM

NHS.net Connect Reference: INC46926630

Microsoft Reference: TM1466820

Issue Status: ONGOING

Issue Description: Users encounter loading delays when opening the Microsoft Teams desktop client on Windows devices.

More info: Specifically, when first opening Microsoft Teams on Windows devices, some users may be initially unable to load the client or may encounter loading delays of up to two minutes. While they are focused on remediation, affected users may be able to avoid impact by utilising Microsoft Teams on the web or alternative Teams access methods such as the Teams mobile app.

Current Update: 04/09/2026 08:41:00 AM – Microsoft has analysis of service logs and telemetry has been inconclusive. While they continue to investigate, they are reaching out to a subset of impacted users to collect impacted client logs that they are anticipating will help us isolate the issue and determine their options for remediation.

Scope of impact: Your organisation is affected by this event, and some users opening Microsoft Teams to view new messages are impacted. This information may be updated as the investigation continues.

Next update by: Friday, September 4, 2026, at 5:30 PM UTC