Officially released on Ma(with its first Windows Insider preview version released on the same day), Windows Server 2019 brings to the table a plethora of massive improvements from its predecessors. You can install Windows Admin Center on Windows Server 2019 as well as Windows 10 and earlier versions of Windows and Windows Server, and use it to manage servers and clusters running Windows Server 2008 R2 and later.
It comes at no additional cost beyond Windows and is ready to use in production. Windows Admin Center is a locally deployed, browser-based app for managing servers, clusters, hyper-converged infrastructure, and Windows 10 PCs.