Microsoft has just released the Technical Preview 4 of Windows Server 2016, the next generation of Windows Server that will provide a wide range of new and enhanced features and capabilities spanning server virtualization, storage, software-defined networking, server management and automation, web and application platform, access and information protection, virtual desktop infrastructure, and more. To evaluate it just go to the download page: https://www.microsoft.com/en-us/evalcenter/evaluate-windows-server-technical-preview