https://wccftech.com/windows-10-2019-first-preview-build/

Back from the holidays and welcoming the new year, the Windows development team has this evening released a fresh new Windows 10 2019 Preview Build. This build is coming from the upcoming version of Windows 10 slated for a Spring release.

Windows 10 2019 Preview Build 18309 is now available to Insiders in the Skip Ahead and Fast ring, and brings several small features improvements and general fixes. Among other feature improvements, today’s update further pushes password-less accounts and removes Cortana voice-over when you are trying to clean install Windows 10 Pro, Enterprise, or Education editions.