Outlook stuck on 'Processing' Fix

Solution to fix Outlook when it gets stuck loading.

When launching Outlook from the shortcut it got stuck booting up. It was "Processing" indefinitely. The solution is simple and takes less than 30 seconds.

Try closing the app and launching it in safe mode. Here’s how you can do it:

Use the Windows key + R keyboard shortcut to open the Run command.
Click the OK button.
Close the Outlook (Safe Mode) app.
Once you’ve completed these steps, launch the app normally one more time, and Outlook should no longer get stuck with the “Processing” message.