Microsoft is losing a key AI exec during a crucial moment that could shape the future of the company

Microsoft is losing a key executive who helped the Redmond-based company turn artificial intelligence research into products just as its AI business is getting off the ground. Harry Shum, who runs Microsoft's AI and Research group, is leaving in February after 23 years at Microsoft. He has already shifted his group and responsibilities to Microsoft Chief Technology Officer Kevin Scott, which include overseeing the company's AI strategy, research and development on infrastructure, services, and apps, and AI-focused product groups including Bing. The news was first reported by ZDNet's Mary Jo Foley, and confirmed by Microsoft to Business Insider. Shum's departure comes at a time when Microsoft is making big investments in AI.