Outlook hyperlinks default to Microsoft Edge

A recent change will now default hyperlinks in Outlook to open in Microsoft Edge regardless of your default browser choice set in Windows.

Multitask smarter with Microsoft 365 and Edge | Microsoft 365 Blog

For Windows 10:

To resolve the issue, change the default browser in Outlook options.

1. Open Default Apps in Settings and set the default browser.
2. Launch Microsoft Outlook, and click File → Options → Advanced.
3. Under “Link handling”, change the dropdown option for “Open hyperlinks from Outlook in:” to “Default Browser“.
4. Click OK.
   

That’s it. Outlook should now open hyperlinks in your default browser instead of Edge.