I see your TLD is “.de” so maybe there it works, not in America. Home of the “free”.

Changing the setting in Teams and Outlook to Default Browser resulted in links that did not work at all. Removed Teams add-on was the only solution.

Meanwhile, if you use Microsoft Teams & Outlook with the Teams add-on installed … and you are wondering why your email links are suddenly opening in Edge instead of your default browser, disable the Teams add-on in Outlook and rage for a moment at the stupidity.

Teams is forcing Edge browser to open links in new Teams and by extension, in Outlook. Setting the default browser to open links within Outlook settings just leads to un-clickable links. The only way to fix it is to disable the Teams Outlook add-on.

Yes, same old Microsoft. Anyone who thinks they have changed in any way since the days of forcing Internet Explorer as the default are sadly and woefully mistaken.