Windows Phone marketing manager David Weeks is to leave Microsoft to start up a photography company.
Weeks joined Microsoft in 1994 as Windows marketing manager, and has since taken up different marketing roles within the business including marketing manager for Windows Mobile, channel marketing manager for EMEA and Windows Vista marketing manager.
Oded Ran replaces Weeks, reporting in to Microsoft UK director of mobile business Alex Reeve.
Windows Mobile was rebranded Windows Phone at the launch of its new operating system Windows 6.5 and was given a 40 per cent boost in budgeting for the marketing of the new brand.
This week, it confirmed its Windows Phone 7 platform at Mobile World Congress in Barcelona.
Windows Phone 7 follows Windows Mobile 6.5, and integrates Xbox LIVE games and its Zune music and video function. The first devices bearing the operating systems will not appear, however, until Christmas.
Mobile operators AT&T, Deutsche Telekom, Orange, SFR, Sprint, Telecom Italia, Telefónica, Telstra, T-Mobile USA, Verizon Wireless and Vodafone will range Windows Phones 7 handsets in due course.
Manufacturers Dell, Garmin-Asus, HTC, HP, LG, Samsung, Sony Ericsson and Toshiba are working on handsets to run off the platform, to be avalable in a rush in time for Christmas.
Orange and AT&T will be network partners at launch.