Former Microsoft corporate VP Carolyn Everson, who has reportedly left for Facebook.

After an eight-month stint at Microsoft, Carolyn Everson, who had served as the company's corporate vice president of global ad sales and strategy, has left the company for Facebook.

AllThingsD, which was the first to report the news this evening, said Everson will take on the role of VP of global sales for Facebook, a spot that had been left back in late October by Mike Murphy.

Microsoft and Facebook remain business partners, with Microsoft having taken a $240 million stake in the social-networking giant back in 2007. Employees have regularly gone back and forth between the two companies for jobs, though Everson represents one of the more high profile departures.

Before her time at Microsoft, Everson was COO and executive VP of U.S. ad sales for MTV Networks. Before that, she served in a number of executive roles for Primedia.

A Microsoft representative declined to comment on Everson's departure. Facebook, however, provided CNET with the following statement:

"Microsoft was one of our earliest partners and is still one of our most valued. We have a long and strong relationship that includes search ads on our site, a social layer on Bing search results, and a deep and popular integration with Xbox. They are a leader when it comes to unlocking the power of social for their already popular products and services. We look forward to continuing to expand our relationship with them."

Updated 6:15 p.m. PT with responses from Microsoft and Facebook.