Microsoft Appoints New Presidents — For Mobile, Entertainment And Office

Microsoft (NSDQ: MSFT) is turning to its existing executive ranks to fill the vacancies left by the departures of entertainment and devices president Robbie Bach and business division president Stephen Elop. The company is promoting three executives to the roles of president: Andy Lees, who has been SVP of Microsoft’s mobile communications business, will now be president of the mobile communications business; Don Mattrick, who has led the company’s Xbox business and added responsibility for Zune and Windows Media Center in January, will now be president of interactive entertainment; and Kurt DelBene, an SVP at the Microsoft Business Division, will now be president of the newly renamed Office Division.

The promotions add a seventh president to Microsoft’s executive team, since both interactive entertainment and mobile positions previously reported to Bach. By adding a president solely to oversee mobile, Microsoft once again shows its high hopes for that business, especially since the revenue mobile currently generates is a fraction of that generated by the businesses the other presidents watch over. Lees has led the development Windows Phone 7, which launches in 10 days and so far has had favorable reviews, although he also was responsible for the Kin, which famously flopped.

Despite the addition of a new president, the company is not changing how it reports its financial results. CNET’s Ina Fried says the company will still report results for five units — server and tools, entertainment and devices, online services, Windows, and the business division. Here’s the memo that Ballmer sent to employees announcing the promotions this morning.