Outlook reminders not appearing

When Outlook reminders are not appearing on there expected times, try these steps to fix the problem:

Verify the reminders are enabled:
In Outlook go to Tools > Options > Other (tab) > Advanced Options > Reminder Options and verify the Display the reminder box is checked.

If that is checked, then go to Start > Run > type outlook /cleanreminders.

If there is still no solution, then go to Start > Run > type outlook /resetfolders.

Microsoft Support