From: rouse9001 on
When deleting a task that was created from an email, how do I restore the
option to keep the original email from being deleted, too?

By default, a message box warned me (or asked me? I can't remember now) that
the original email would be deleted as well.

B/f validating that I was ok with that, I carelessly checked the "do not ask
me again" box.

I regret this immensely, since I would like to delete tasks, but keep
certain emails form which tasks may have been created.

How do I restore the alert to its default setting such that it appears
whenever I try to delete a task created from an email.