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Step 1
Open Microsoft Outlook and click the "Tasks" link on the left side of the window pane. This opens a window with the list of all opened and closed tasks.
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Step 2
Select "Completed Tasks" from the right side of the window pane labeled "Current View." This filters all the tasks and only shows the one you have completed, making this process easier. It also eliminates accidentally deleting the wrong task.
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Step 3
Check the box for each completed task you want to delete. Click the "Edit" main menu item and select "Delete."
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Step 4
Click "Yes" at the confirmation window that asks you if you really want to delete the tasks. The selected tasks are then deleted.













