Is there an option to disable the delete task functionality for regular users?

Hello Ates, Baris

Thank you for raising this concern, and I completely understand your point about how task deletion can sometimes lead to unintended data loss for the team without anyone noticing.  

At the moment, Microsoft Planner doesn’t include a built‑in option in the Planner or Teams interface to limit the delete permission only to Plan Owners. Because Planner is tied to the Microsoft 365 Group permission model, all members of the group inherit the same level of access, which includes creating, editing, and deleting tasks. 

During my research, I found that there is a way to control deletion permissions using PowerShell. The good news is that the PowerShell method is quite straightforward, and it allows an admin to prevent specific users from deleting tasks they did not create. If you’re open to using this approach, I’d be more than happy to guide you through the steps: Block a user from deleting tasks in Microsoft Planner they didn't create - Microsoft Planner | Micr… 

If PowerShell isn’t an option for your environment, then currently there isn’t yet a UI‑level control for this scenario. Because of that, I would strongly recommend submitting your suggestion through the Microsoft Feedback Portal: Planner · Community. This is the official channel where feedback is reviewed by the product team and taken into account for future updates. 

Your input is genuinely important, especially since you highlighted the risk of accidental data loss and it helps the product team prioritize features that matter to organizations like yours. 

After submitting your request on the site, you can return here and paste the link into this thread. That way, other users who visit this discussion can click the link and upvote your request to help bring more attention to it. You can also click "Accepted" to pin this response to the top of the thread, making it easier for others to find and support your request.   

Please feel free to let me know how you’d like to proceed. I’m here and happy to help in whichever direction works best for you. 

Kind regards, 

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Currently, Microsoft Planner does allow tenant admins to block specific users from deleting tasks that they did not create using PowerShell commands. However, there is no built-in option within the Planner interface itself to restrict the delete functionality for regular users without using PowerShell. Therefore, if you want to ensure that only Plan Owners can delete tasks, you would need to utilize the PowerShell cmdlet Set-PlannerUserPolicy to block task deletion for non-owner users.

If you are looking for a non-PowerShell solution, unfortunately, that capability does not exist as per the current documentation.