How do I force all appointments I either create or receive to automatically
have a 15 minute reminder?  The Tools -> Options -> Preferences -> Calendar
-> Default Reminder setting doesn't seem to do this.  The Outlook help says
this:

Default reminder check box— Specify the amount of time before appointments
that you want to be reminded about the appointment.

That doesn't specify if the Default Reminder will apply only to appointments
I create, or if all appointments in my calendar, regardless of origin, will
have a default reminder set.  I want the latter behaviour.  I don't care who
created the appointment and invited me; I want to be reminded by default.