The latest trick is they ignore the default choice completely and open all links in Outlook in edge anyhow, also they are sending notifications saying to use edge or get less battery time.

If you need more ammunition they recently also changed it so all links in Outlook opens in Edge even if it’s not the default browser. You have to go to settings and find an entirely separate default browser setting to stop it.

As far as I’m aware WS is pretty close to what you get by just using virtalbox (with an easier setup) so you could do that on Linux. With Linux you also have more advanced solutions though like https://en.wikipedia.org/wiki/Qubes_OS