Microsoft Invest - Delete a custom creative template
You can delete existing custom templates from the Creative Templates screen at any time. You can't delete Microsoft Advertising standard templates.
Navigate to the Creative Templates screen by selecting Creative > Templates.
Select the checkboxes for any creative templates that need to be deleted.
Select the Actions pull-down menu and select Delete.
The Delete template(s) dialog displays.
Select Delete.
The custom creative template will no longer display on the Creative Templates screen.