Classic Outlook - Assigned tasks do not reflect completion status correctly for assignor

CarsonP-1440 0 Reputation points
2026-09-24T20:45:20.9+00:00

We use classic Outlook, when assigning a task to another internal staff member and transferring ownership to them, completion status does not reflect on the assignors end.

-All 4 of the below options are enabled for everyone involved

-Open tasks in To-Do is not enabled

-Tasks are being marked completed in the task pane, not To-Do

-Accepted and completion emails are received by the assignor, status still shows as 0% completion

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Looking forward to hear if anyone is aware of this issue or has experienced the same.

Microsoft 365 and Office | Microsoft To Do | For business
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  1. Ivory 1,825 Reputation points Independent Advisor
    2026-09-24T21:09:12.1866667+00:00

    Hi Carson,

    According to Assign and track tasks in classic Outlook | Microsoft Support, when Outlook task tracking is functioning correctly, the assignor's copy of the task should be automatically updated when the assignee sends a task status update or marks the task complete.

    As initial troubleshooting, please try the following steps:

    1. Create a brand-new test task and verify that Keep my task list updated with copies of tasks I assign to other people is enabled under File > Options > Tasks for the assignor. Existing tasks assigned before this setting was enabled may not be tracked correctly.
    2. Run an Online Repair of Microsoft 365 Apps on both affected machines. You can follow this article: Repair an Office application | Microsoft Support
    3. Test the same scenario using different mailboxes to determine whether the issue is tied to a specific user or occurs for all task assignments.
    4. Check whether the behavior persists in Outlook on another workstation or in a newly created Classic Outlook profile. To create a new Classic Outlook profile, please consult Create a profile in classic Outlook for Windows | Microsoft Support

    If the completion emails are being received but the task status is not updating in the assignor's task list, the issue may require further back end investigation.

    Given the nature of the problem, the most effective next step is reaching out to your IT admin and ask them to use their admin credentials to submit a support request through the Microsoft 365 Admin Center on your behalf.

    In case you do not know who is your IT admin, kindly refer to this article: How do I find my Microsoft 365 admin? - Microsoft Support 

    This route ensures that a Microsoft support engineer can initiate a remote session to investigate backend configurations, run advanced diagnostic tools, and, if necessary, they can request to escalate the case to specialized teams with access to internal systems and logs. These backend resources are essential for resolving issues that go beyond what’s visible in the user interface.

    I hope this helps you resolve the issue quickly. Please feel free to reach out anytime if you need further assistance.  

    If the answer is helpful, please click 'Yes' and kindly upvote it.

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