Going forward, Windows will no longer do this. It will only prompt the user to set Edge as the default browser when Edge is opened. Additionally, setting a third-party browser as default will also ...

The change will only apply to Windows 10 and Windows 11 devices, meaning people using Mac will continue to have their Outlook links open in their default browser.

Microsoft wants changing default apps in Windows to be less of a mess But it probably won't stop the OS from reminding you that Edge exists.