That unfortunately, is not how the DMCA works. DMCA was designed to catch not just normal pirates that share the copied content, but also "crackers" that figur

That unfortunately, is not how the DMCA works. DMCA was designed to catch not just normal pirates that share the copied content, but also "crackers" that figure out how to share content that is protected somehow, as such it offers various ways to infringe it without infringing the copyright itself. Basically they are accusing MS of behaving like crackers, by removing stuff from code to allow it to get shared illegally.