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mafug's avatar
mafug
Copper Contributor
Jan 13, 2026

Tasks show up twice in To Do module in Outlook On Desktop

I have a strange problem with my tasks in the To Do module when it is used inside the Outlook app installed on my Windows PC. Some tasks show up twice there. When I check other places the task is listed only once there:

  • On the To Do Webapp in the browser
  • In the To Do App on my Android Phone
  • When I start Outlook in the browser and check the To Do module there

But on my Desktop in the Outlook App the task is listed twice. When I mark it a completed on my To Do app on my Android Phone one of the two task shown gets marked as completed (and is shown as completed in all three places mentioned above), however the other one stays in the not completed status. 

Triggering the Sync in the To Do module in Outlook does not solve the issue, restarting Outlook does not solve it as well. I have to delete the second task manually in the To Do module. 

This is really annoying because I get the reminder for a task from the outlook app on Windows but cannot really use Outlook to manage the task there. 

Does anyone else have this problem? 

1 Reply

  • mafug's avatar
    mafug
    Copper Contributor

    I did an additional test, I created a new task with a reminder. 

    I get the notification in the Outlook App when it is due:

    The task is only shown in Outlook one at that moment. 

    When I click on the notification, the second task is created in the Outlook App:

    However in Outlook in the browser still only one task is shown:

    So it must be related with the click on the notification. 

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