Live status of all services Advisory

Users may not receive notifications when added to or removed from tags in Microsoft Teams

Microsoft Teams TM1517449

Users may not receive notifications when added to or removed from tags in Microsoft Teams.

Status
Service degradation
Feature
Notifications
Region
Not specified (all regions)
Started
Oct 20, 2026, 21:49 CEST
Duration
2 h 21 min
Last update
Oct 20, 2026, 21:52 CEST
Next update
Oct 21, 2026, 22:30 CEST

Current status

We identified a recent update to the authentication flow that contained the issue resulting in impact. We're validating a fix to resolve this issue and will provide a remediation timeline as soon as one becomes available.

More info

This event may also impact notifications surrounding tag creation, deletion, or restoration.

This only impact notifications and tag operations still succeed as expected.

Scope of impact

This event may impact any user, and any user may not receive notifications when added to or removed from tags in Microsoft Teams. This information may be updated as our investigation continues.

Root cause

A recent update to the authentication flow that contained the issue resulting in impact.

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To see whether your own tenant is affected, check Service health in the Microsoft 365 admin center. Only a backup outside Microsoft protects against data loss, and only a tested break-glass account against locked-out admins. We set up both in fixed-scope sprints.

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.