Live status of all services Advisory · resolved

Users may not be able to access Class Notebooks in Microsoft OneNote

Microsoft 365 suite MO1540560

Users may have not been able to access Class Notebooks in Microsoft OneNote.

Status
Service restored
Feature
Company or User Administration
Region
Not specified (all regions)
Started
Nov 6, 2026, 00:36 CET
Resolved
Nov 6, 2026, 02:01 CET
Duration
1 h 24 min

More info

The Class Notebook tab was missing in OneNote making it inaccessible.

Scope of impact

This event may have impacted any user attempting to utilize the Class Notebooks toolbar in Microsoft OneNote

Root cause

An issue contained in a recent service change that was resulting in impact.

Next steps: - We're reviewing the responsible service change to better understand what led to the error that resulted in impact and prevent similar future occurrences.

This is the final update for the event.

Final status

We identified an issue contained in a recent service change that was resulting in impact. We reverted this change and were able to confirm that this successfully resolved the event through monitoring service health data.

Timeline

Every update Microsoft posted for this issue, newest first.

  1. Nov 6, 2026, 02:03 CET

    We identified an issue contained in a recent service change that was resulting in impact. We reverted this change and were able to confirm that this successfully resolved the event through monitoring service health data.

  2. Nov 6, 2026, 00:39 CET

    We've investigated a problem with accessing Class Notebook in OneNote and confirmed that service is now restored. We'll provide additional information in a closure summary within the "History" section of the "Service health" dashboard shortly.

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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.