I've got a couple of dozen tasks that I use as personal todo lists.
I've just moved to Outlook365 and my reminders are not working, although at this moment, 2 are.
I can't figure out why some are working and others not.

All my tasks have due dates. In Outlook 2003 they also had reminders and would show up in my reminder window when those dates arrived.
At startup of Outlook 2013, I showed 2 items in my reminder window.
When I opened each of the tasks that were past-due and should have showed in the reminder window, all had a due date that was past due (as they should have had) BUT NONE have the reminder box checked.

So, I checked a reminder box, and then clicked SAVE & CLOSE.

But, when I opened that same task again, the box was no longer checked (the due date was still there).

Can someone help me please?