Open the Windows Settings app
Go to Apps
Select Default apps
Choose your preferred browser
Set it as the default for HTTP and HTTPS
Set it as the default for .htm and .html files
Open Outlook
Click File
Select Options
Go to Advanced
Under Link handling or Browser settings, choose the default browser option if available
Restart Outlook
If links still open in the wrong browser, set the browser as default in the browser’s own settings
In Microsoft Edge, turn off Edge-specific link handling if needed
Restart your computer if the change does not take effect