It's quite funny that they will switch to german technology now, because I can think of no german service provider that would not immediately comply with any and all US sanctions.
However, I was able to read it, which would not be the case if he had just phoned Nadella. Who knows, perhaps he did and Nadella refused to play? I see that he did not attend the inauguration..
I doubt Trump even knew how the sanctions would play out, in terms of all the effects on the ICC. But the IT services are a clear one for the HN crowd to pay attention to.