Outlook 2025 Calendar Reminders Not Popping Up. When you open the 'old' outlook on desktop a secondary small window pops up with the title reminders with a small bell icon and a number indicating how many calendar. In this guide, we will delve into troubleshooting.

This problem can occur if you have the option to display reminders is turned off either in the outlook user interface or through a group policy setting. I am using the new web style outlook client on windows 11.