How to Repair Outlook on Windows

From the desktop, search for Add and Remove Programs

Scroll through the list of installed programs until you find Microsoft 365 Apps for Enterprise

Click on the three dots to the right of the application.

Choose Modify

You can choose a Quick Repair or an Online Repair.

The Quick Repair will do a basic repair and can sometimes resolve the issue you are having. If the Quick Repair doesn’t fix your issue, run the Online Repair. This will do a full repair of your Office suite. This can take a while to complete.

Follow through the prompts and restart Outlook when finished.