Terry Myerson replace Mr. lees, who had previously overseen engineering efforts for the phone group. Myerson will now be new head of Windows Phone development, marketing and other business functions, wrote Ballmer.
Ballmer said that Lees, in his new role, will “work for me on a time-critical opportunity focused on driving maximum impact in 2012 with Windows Phone and Windows 8.” He did not elaborate on exactly what the position entailed or specify Lees’ title.