Microsoft has confirmed global executives Richard Dunmall, VP of global agencies and accounts and Marc Bresseel, VP global marketing, will leave the company.
Dunmall, former Microsoft Advertising VP for the Greater Asia Pacific and Americas, took on his current global role in November 2010, relocating from Hong Kong to New York for the position.
Online reports hinted Dunmall could be a candidate for a top advertising role at Google, but a Microsoft spokesperson was unable to elaborate on reasons for his departure.
Microsoft also confirmed Marc Bresseel, who first joined the company in 1996 as corporate communications manager, will step down from his role as global marketing chief, but the timing is not yet clear.
In the meantime, Keith Lorizio, current VP of US sales and marketing, will step in to oversee the global agency team.
An official statement from Microsoft said: "Like any company, Microsoft continually evaluates its operations, and works to align the business in a way that positions us ahead of industry trends.
"I can assure you we’re thinking about the exciting new opportunities that Windows 8, Windows Phone, Xbox, and Skype present for our advertising and marketing partners."