Microsoft's key customers aren't consumers, its business and government: specifically enterprise licensing agreements. If Microsoft seriously upset business and governments, they wouldn't be profitable, if in business at all, not long after that.
Because of Microsoft's dominant position considering near ubiquitous penetration of Microsoft Office in government, one part of government will slap Microsoft on the wrist for anti-consumer practices, whilst other parts will still continue to purchase Office (and other products) because there simply isn't another product that competes directly feature-by-feature and compatibility (and usability in part), which matters in (often archaic) government processes.
It would cost far too much money to try to migrate away, at least at this point. Euro-Office[1] seems poised, if not likely, to dramatically shift that balance once it becomes a key part of EU government machinery.
It will be interesting to see how Microsoft responds to Euro-Office. If it takes off, it could invigorate other government efforts to fork Euro-Office and replace Microsoft's suite of tools. Someone just needs to put the business case to the relevant federal government stakeholders comparing the cost of (on-going) licensing vs. the cost of building an internal development team to maintain a fork for their whole-of-government machinery.
Given that there is a fair bit of EU and NATO overlap population-wise, if a significant portion of EU-based NATO countries adopt Euro-Office exclusively, I would suggest Euro-Office then poses an existential threat to Microsoft Office, and perhaps Microsoft's business productivity pursuits.
The moat that software companies had back in the 90s and 2000s before the Internet really took off, was distributing software by physical media. The Internet (as much as I have nostalgia for physical media) completely obliterated that model for mass-distribution productivity software, and indeed many others.
I'm certainly keen to give Euro-Office a test run, since the code is freely available (on GitHub too, ironically[2]).
[1] https://en.wikipedia.org/wiki/Euro-Office
[2] https://github.com/Euro-Office