Issue with webhook-based task notifications in Microsoft To Do

Title: Issue with webhook-based task notifications in Microsoft To Do

User impact: 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 Microsoft Graph: 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 status: We're continuing to internally validate the fix and we'll aim to provide an estimated deployment timeline as soon as it's available.

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

Next update by: Monday, June 22, 2026, at 12:00 PM UTC

Title: Issue with webhook-based task notifications in Microsoft To Do

User impact: 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 status: We've completed the development of the long-term fix to restore webhook-based task notifications in Microsoft To Do, and we're now conducting a period of internal testing to ensure the fix produces the expected resolution. Once complete, we'll begin deploying the fix to the affected infrastructure.

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 17, 2026, at 12:00 PM UTC

Title: Issue with webhook-based task notifications in Microsoft To Do

User impact: 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 status: We've identified a configuration issue affecting webhook-based task notifications in Microsoft To Do. We're developing a long-term fix to restore functionality, and we'll 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