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Some users may be unable to load their calendar in the Microsoft Teams web app

Microsoft Teams TM1527410

Users may be unable to load their calendar in the Microsoft Teams web app.

Status
Service degradation
Feature
Calendar
Region
Not specified (all regions)
Started
Oct 27, 2026, 15:04 CET
Duration
1 h 57 min
Last update
Oct 27, 2026, 16:25 CET
Next update
Oct 27, 2026, 19:00 CET

Current status

We’re continuing our review of the service monitoring telemetry and system logs to isolate the root cause and develop a remediation strategy.

More info

Affected users may experience extended loading times, and subsequent attempts to load their calendar may succeed.

Scope of impact

Some users attempting to load their calendar in the Microsoft Teams web app may be impacted. This information may be updated as our investigation continues.

Timeline

Every update Microsoft posted for this issue, newest first.

  1. Oct 27, 2026, 16:25 CET

    We’re continuing our review of the service monitoring telemetry and system logs to isolate the root cause and develop a remediation strategy.

  2. Oct 27, 2026, 15:07 CET

    We’re reviewing service monitoring telemetry and system logs to isolate the root cause, in order to develop a remediation plan.

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Source: Microsoft Graph, Service Communications API. This is the view of a Swiss Microsoft 365 tenant: services not licensed there are missing, and individual issues may affect your tenant differently. Microsoft names the region only in the issue text. The Switzerland view shows issues for Switzerland, for Europe in general and those without a region, but not issues that only name other countries such as Germany or the UK. This page is not provided by Microsoft.