Microsoft’s Javier Soltero, the company’s vice president of Cortana, will be departing by the end of the year, according to a report from ZDNet. Following the report’s publication, Soltero confirmed his departure in a tweet posted to his personal account.

Soltero first joined Microsoft when it scooped up his email app Acompli back in late 2014. He and the Acompli team helped Microsoft vastly improve its Outlook iOS app. He later became the overall head of Outlook before taking on the Cortana chief role in March of this year, as part of the company’s massive reorganization that brought a renewed focus on artificial intelligence and the cloud, as well as the departure of Windows chief Terry Myerson.

1/ Some news on the work front...



I've made the decision to leave Microsoft. The past 4 years have been an incredible experience. I'm humbled to have been a part of building something that 100M+ users depend on every day and grateful to have worked with some amazing people. — Javier Soltero (@jsoltero) November 6, 2018

ZDNet reported last month that Microsoft is moving Cortana out of its AI research division and into its Experiences and Devices team, signaling the company’s interest in building out Cortana more as a viable productivity assistant for existing Microsoft software and less as an experimental research project. Soltero is reportedly heading back into the entrepreneurial space, but it’s unclear what his concrete plans are once he leaves Microsoft.

Update 11/6, 3:30PM ET: Added confirmation from Soltero himself, who posted about his departure from Microsoft on his personal Twitter account.