If a recurring meeting is rescheduled or revised to have a new phone number,
then I accept the new schedule.  I now have a double entry for the remaining
meetings of the first schedule.  When I delete the original meeting schedule,
it deletes all the meetings in the past too, meetings I attended and may want
a record of.  The rescheduled meeting should allow a merge of overlapped
meetings and thus not double the schedule.  Deleting a series may work
correctly, but what method is used to replace future meetings in the series?