https://wccftech.com/windows-10-1909-available-msdn/

Microsoft has released its upcoming Windows 10 1909 (November 2019 Update) on MSDN. Both consumer and business editions are available for download for developers.

As reported earlier, Windows 10 version 1909 will be delivered to the public next month. The Slow and Release Preview ring Insiders are already testing the final build of the upcoming desktop operating system. With this feature update, Microsoft is entirely focusing on performance improvements and stability of the OS rather than delivering a long list of often-untested new features.