Microsoft today announced the release of Windows 10, version 21H1 for commercial pre-release validation. Using this build, commercial customers can explore the new features and validate the build before general availability. You can download Windows 10, version 21H1 through Windows Update, Windows Server Update Services (WSUS), and Azure Marketplace, or you can download an ISO file.
Windows 10 version 21H1 will be delivered to devices currently running Windows 10, version 2004 or version 20H2 using an enablement package. This is the same technology we used to update devices from Windows 10, version 2004 to version 20H2.