Final answer:
To delete a Microsoft Planner plan, navigate to the Planner hub, select the plan, go to 'Plan settings,' scroll down and click on 'Delete this plan.' Confirm the deletion to permanently remove the plan. Ensure you have the necessary permissions to perform this action.
Step-by-step explanation:
How to Delete a Microsoft Planner Plan
To delete a Microsoft Planner plan, you need to be the admin or a member with sufficient permissions. First, navigate to the Planner hub and select the plan you wish to delete. Once open, click on the three dots (ellipsis) menu on the top-right of the plan's banner, and choose "Plan settings." Scroll down to the bottom of the settings pane and select "Delete this plan". Confirm the deletion by clicking "Delete" again in the confirmation dialog box. Please be aware that deleting a plan is a permanent action and cannot be undone, so make sure you really want to proceed with this action.
Remember that the option to delete can only be seen by users who have administrative rights or the necessary permissions within the group associated with the plan.