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Microsoft's in-game advertising executive Carol Koh Evans has left the company, rejoining wedding-planning site The Knot as its COO. Prior to Microsoft, Evans led The Knot through its IPO in 1999 as the company's head of corporate development. Evans is the second major media executive to bolt Microsoft this year. She follows Joanne Bradford, who left the company to join Los Angeles-based ad agency Spot Runner in March. Evans's departure is another blow to Microsoft's plan to grow its online business internally — "organically" as part of "Project Granola," as the company calls it — following the company's failed bid to acquire Yahoo.