I use Outlook 2003 and 2007 (two machines) and its behavior is the same on both in this regard. If I have a meeting, to-do item that comes due, or an email flagged with a reminder, the window pops up at the corresponding time to show me the things that have come due. I typically have several. But if I close the window, I can’t force it to appear again until another meeting/reminder comes due.
Is there a way to force it to appear without waiting for another reminder to come due, so I can see my outstanding reminders at will?
I searched for this and couldn’t find exactly what I was looking for.