My Day in Planner and My Day Todo doesn't sync properly

Hi @Jakob Fredriksson, 
Thank you for posting your question in the Microsoft Q&A forum.         

Regarding that Planner’s My Day is updating correctly, but Microsoft To Do (desktop, web, and Outlook integration) is not synchronizing due date changes from Planner or pushing updates back to Planner. I’d like to gather a few more details so we can narrow down the root cause.  

• Does this happen to other user in your organization as well? 
• Have there been any recent changes to your task setup, such as moving tasks between plans, converting tasks, or using Loop tasks more frequently? 
• Are you signed in to To Do with only one work account, or do you have multiple accounts connected? 
• At the moment, there is no official Microsoft announcement or service advisory indicating a known issue with Planner, To Do due date synchronization. 

To validate this on my side, I performed a test by updating due dates in Planner, and the due date synchronized correctly to To Do in my environment 

I created a task with a due date of 16/02/2026. Both To Do and Planner showed the same date

I then updated the due date in the To Do app to 20/06/2026, and the change appeared immediately in Planner as well.

In the meantime, please verify that this setting is enabled in To Do:

Settings → Connected apps → Planner (Ensure the toggle is turned on.)

Or you could try to reset repair the To Do desktop app: 

1/Right-click the Windows Start button and go to Installed apps.

2/Locate Microsoft To Do in the list. 

3/Click the three dots next to it and select Advanced options.   

4/From there, choose Repair to fix the app.

Thank you again for your time and understanding. While my initial response may not resolve the issue immediately, I’d like to gather more details about your situation so I can assist you more effectively.       

I really appreciate your patience, and I’m here to help. Looking forward to your response.  

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Hi everyone, 

Thank you for the additional details, and I truly appreciate you sharing that multiple colleagues are experiencing the same issue. Based on your feedback and the fact that this behavior is occurring across different users, devices, browsers, and the To Do web version, it strongly suggests that this may be a widespread service side issue. 

At this time, there hasn’t been any official announcement, service advisory, or confirmed fix published by Microsoft regarding this issue. As forum moderators, we do not have access to internal service logs, backend diagnostics, or engineering dashboards due to privacy and security restrictions. 

Because of this, issues that involve potential backend or service problems can only be fully investigated and fixed by the Microsoft product engineering team. The only channel that connects directly to the engineering and service teams is the Microsoft 365 Admin Center. 

I strongly recommend reaching out to your Microsoft 365 administrator and asking them to report this issue through the Microsoft 365 Admin Center, as this helps Microsoft track service-related problems more efficiently.  

Steps for the Microsoft 365 Admin: 

1. Go to the Microsoft 365 Admin Center 
2. Navigate to Health 
3. Select Service health 
4. Click Report an issue
    

Submitting the issue here helps Microsoft investigate and, if needed, open a new service incident for broader visibility. 

Thank you again for your patience and cooperation while this is looked into. 

Apparently Microsoft has noted the issue. I don't have access to the record, but our admin forwarded this to me:

Some users may see delays with Microsoft Planner tasks updating to Microsoft To-Do ID: PL1235137 Issue type: Advisory Status Service Degradation Impacted services Planner Details Title: Some users may see delays with Microsoft Planner tasks updating to Microsoft To-Do
User impact: Users may see delays with Microsoft Planner tasks updating to Microsoft To-Do.
Current status: We identified an issue that’s causing delays within the data pipeline that facilitates Microsoft Planner task updates in Microsoft To-Do, leading to impact. We can see that the backlog of events is processing and that the service health is improving. We'll continue monitoring the backlog processing to validate that the impact is remediated.
Scope of impact: This issue may impact some users in the North America and Europe regions who are attempting to get Microsoft Planner tasks updated to Microsoft To-Do.
Start time: Tuesday, February 3, 2026, at 12:00 AM UTC

Root cause: An issue is causing delays within the data pipeline that facilitates Microsoft Planner task updates in Microsoft To-Do, leading to impact.
Next update by: Saturday, February 21, 2026, at 12:00 AM UTC