Microsoft 365 Alert – Service Degradation – Microsoft 365 suite – Users are unable to receive webhook-based task notifications in Microsoft To Do – ONGOING

Announcements Arpan Das

02/05/2026 09:03:00 AM

NHSmail Reference: INC46841107

Microsoft Reference: MO1331639

Issue Status: ONGOING

Issue Description: Users are unable to receive webhook-based task notifications in Microsoft To Do.

More info: This issue may affect any webhook-based task notification in Microsoft To Do.

Any webhook notification delivery to your organization’s registered notificationUrl endpoints that was setup using MSGraph: https://learn.microsoft.com/en-us/graph/change-notifications-with-resource-data?tabs=csharp
– Any automation or workflow that depends on receiving real-time task change callbacks

If your organization relies on webhook notifications for task automation:
– Consider temporary polling via GET requests to /me/todo/lists/{listId}/tasks as a workaround: https://learn.microsoft.com/en-us/graph/api/resources/todo-overview?view=graph-rest-1.0

Current Update: 02/05/2026 09:03:00 AM– Microsoft has identified a configuration issue affecting webhook-based task notifications in Microsoft To Do. They are developing a long-term fix to restore functionality, and they will provide additional updates as this progresses.

Scope of impact: Your organization is impacted by this event, and this issue may affect any user within your organization.

Next update by: Wednesday, June 10, 2026, at 12:00 PM UTC