We are talking about two wildly different things.
Indicators of pirated software in metadata of documents (which would probably make ms office immediately be outlawed by the EU bc of privacy violations) on my end.
The general licensing situation of ms and their customers on yours.
I know they make audits. I dont think you can get in trouble for using pirated ms software to work on documents though.
Still, the question remains why OP is working on company stuff on their private device. Sounds very much like they might be inexperienced and easily taken advantage of or just overeager, which isnt healthy either.