There's an interesting twist. It would have made for some pointed litigation drama. But looks like the MS cave is quickly in. The fine not so much. Maybe an ongoing saga with this one.
I wonder which Microsoft product will be next. I won't be surprised if it would be something related to enterprise management/identity/authentication like Intune/Microsoft Entra/Windows Hello for Business combo. In itself is seems ok, because IT wants to centralize and use zero-trust approach. It has valid reasons. This may create competitive advantage that, if abused by i.e. preferring its own apps, may lead to another antitrust. For example developers, using Gnu/Linux on their laptops, at the company I am working in have to use Microsoft Edge to access many internal resources, because only pair Intune + Edge works at the moment... https://learn.microsoft.com/en-us/deployedge/ms-edge-security-conditional-access https://learn.microsoft.com/en-us/entra/identity/conditional-access/concept-conditional-access-conditions#supported-browsers