The font size/type in Microsoft To Do are just a little too small compared to the Reminders app. The only place where Reminders is better is the font size/type and readability.
So much better than the Apple Reminders app I'm an Apple fan to the core, but the Microsoft To Do app simply outdoes Apple Reminders in almost every aspect of UI and UX. If you’re not using upgraded reminders, you can also see your reminders on a Windows computer if Tasks is turned on. Changes you make to reminders and reminder lists on automatically appear on your iPhone, iPad, iPod touch, and Mac when those devices have iCloud Reminders turned on. This worked for me, and I hope it is helpful to you as well. Finally, Search (located at the top of the Outlook widow) on ‘modified: today’. Then just go to the top of the list and select the Reminders column (the little alarm bell icon) to place Reminders at the top of your Calendar list.
Outlook will rebuild the folder and the (good) reminders. After clicking on the reminders folder if you cannot find the corrupt reminder in the reminder folder you can delete the entire Reminders folder. For example, if you're out of the office for three days, you might not want to come back and see reminders for the meetings that took place while you were gone. If you don't want to see reminders for events in the past, you can tell Outlook to automatically dismiss reminders for past events. Automatically dismiss reminders for past events.