He will be out in 2 years or less. The problem with Microsoft is it has a massive old boys network. Once Ye Olde Microsoft mafia moves in, people who haven't been with the company for 15-20 years tend to move out, irrespective of their position. This is also why all Microsoft acquisitions where old boys network was allowed to intrude (basically all but Skype) have been promptly run into the ground within 2-3 years after acquisition.