They will not. I can't find the link at the moment but I read an article about 6 months or so ago where, iirc, Steve Balmer and Satya Nadella where talking abou

They will not. I can't find the link at the moment but I read an article about 6 months or so ago where, iirc, Steve Balmer and Satya Nadella where talking about Microsoft's open source plans and some of the history and made a remark that fighting open source "was the correct business choice at the time."