The Microsoft 365 admin centre has said that web links from Azure Active Directory (AAD) accounts and Microsoft (MSA) accounts in the Outlook for Windows app will open in Microsoft Edge in a single view showing the opened link side-by-side with the email it came from.

While this won't affect the default browser setting in Windows, it's yet another part of Microsoft 365 and Windows that ignores your default browser choice for links.

Vole already does this with the Widgets system in Windows 11 and even the search experience, where you'll be forced into Edge if you click a link, even if you have another browser set as default.

It is unclear what Microsoft gets out of this as it does seem to be spoiling for a fight with monopoly watchdogs as it is using Office to give Edge a leg up.