It is being said that this is an aftereffect of CEO Satya Nadella joining Microsoft. Leblond was working on the Microsoft Office suite for almost 20 years alongside Steven Sinofsky. Leblond was also incharge of development of Office 2010.  However, lately he was working on Windows 8 store and cloud services.

Antoine Leblond Quits Microsoft After Almost 25 Years - 20Antoine Leblond Quits Microsoft After Almost 25 Years - 83Antoine Leblond Quits Microsoft After Almost 25 Years - 95Antoine Leblond Quits Microsoft After Almost 25 Years - 37Antoine Leblond Quits Microsoft After Almost 25 Years - 39