Earlier quoted context omitted.
The EU didn't really fold, they blew him off. It was just a bunch of "yeah sure Donny, here's a bunch of meaningless promises we have no ability or mechanism to actually enforce". For example they promised to buy a bunch of gas, but the EU has no mechanism to make companies or even member states buy gas. The only real concession the EU made was just allowing Trump to tariff them at a certain rate, and not counter-tar…
Regarding the retaliation, I’m unsure who would be hurt more. There are very few ready alternatives to the MS office suite, and none with the close integrations like AD. Most corps run on Microsoft. If those contracts get slapped with tariffs they would become unmanageable to buy. Then, because it isn’t on-premise anymore where you could just continue running without paying for the service contract you lose direct ac…
In an all-out economic war, anything could happen. The source code of Microsoft products probably exists somewhere in Europe (since they have European offices) and definitely binaries, since it's run on European servers. Once nobody plays by the rules anymore, all bets are off.
That said, a trade war would hurt both badly and it would be an epic fail on the side of the US administration. (Since the EU would not start such a trade war by itself.)