I'm writing an add-in for Outlook, but I'm not sure this is the way to
go.  I want to access a public folder and move the documents over to
SharePoint.  I've already gotten the code for SharePoint to work.  I
could use functionality out of the box, but we're on Exchange 5.5,
which doesn't support this, so I'm having to write code to do it.

Anyway, I originally looked into just querying Exchange and doing it,
but there was one gotcha after another, so I decided to do it inside
an Outlook add-in.  However, I only want one instance doing the work.
If there are 2 or 3 people that'll have this add-in, I'd only like one
of them doing the work.

Maybe this is as simple as putting a button on Outlook that
essentially says I'll do the work and sets a flag; but if the others
don't hit the button, they don't.  I'm going to have a thread that
wakes up every 15 minutes and does the processing it needs.  I could
check the flag to see if it's set, and if not, let it just go back to
sleep.

Is there a better way to acheive this functionality?