Ostensibly, Reller, VP of marketing, left because Microsoft consolidated marketing under Chris Capossela as EVP and chief marketing officer. I believe there was no CMO previously. Whether Reller, who is staying to help with the transition, wanted to step aside or not is an open question. Maybe she wants a break after years in high-level positions. Nadella also hired Mark Penn, an advisor to the Clinton family, in the new role of chief strategy officer. Although Nadella came out of Microsoft Business Solutions, he has a lot bigger issues than that and had to hit the ground running since there are billions of dollars in stock value that are riding on the direction he takes the company and these are reflected in the flight of talent - Jon Roskill's move to Acumatica and Joe Corigliano's to Target  come to mind.  I'll stick with my view that the company should sell MBS so that it can work on the bigger issues and Dynamics can end up with a company in which it can get more management attention.