I want an automated way to send a reminder about an event coming up in
my Outlook Calendar to all of the event's attendees (usually, this will
be one attendee).

Say, 4 days before the event, I would like Outlook to dispatch an email
to all of the attendees with a customized subject and body based on the
Label of the event.

I take it that there is no way within Outlook to do this and that there
is no third party software that does this. There seem to be a lot of
programs that will email reminders of events to yourself (one static
email address), but in this case I want to email the reminder to a
different address every week based on who is set to attend the event.

I suppose I could write a macro do to this - do you think that is the
best way?

I would want the macro to check to see if there are any events coming
up with the appropriate labels and if there are, then dispatch an email
and then mark the event accordingly so that I could confirm that the
email has been dispatched. I just don't know how to essentially set up
a cron job so that the macro runs every day (while Outlook is open) and
automatically sends the emails.

Any thoughts that you have would be much appreciated.

Thanks.