Sometimes, even you have removed or cleared a specified reminder, it comes out again. This method will show you how to repair corrupted reminders quickly in Microsoft Outlook.
Step 1: Close and exit your Microsoft Outlook.
Step 2: Press the Windows key and R key simultaneously on the keyboard to open the Run dialog box.
Step 3: In the Run dialog box, type the outlook.exe /cleanreminders in the Open box, and click the OK button. See screen shot below:
Then it will open your Microsoft Outlook with all reminders cleared and regenerated at once.
You can display reminders for a specify outlook folder. Click right mouse button on a data folder and click a Data File Properties. Check this option, as show below: