Microsoft mobile exec to spend more time with Ghana University

Todd Warren, vice president of Microsoft's mobile communications product group, is leaving the company this month.

Warren plans to spend more time working with Ashesi University in Ghana, where he serves on the board.

Warren has been at Microsoft for just more than 21 years and recently led development of Windows Mobile 6.0 and 6.1. For the past few months he's been in a strategy-advisory role while considering his options.