Windows Server 2019 is the cloud-ready operating system that supports your current workloads while introducing new technologies that make it easy to transition to cloud computing when you're ready. It delivers powerful new layers of security along with Azure-inspired innovation for the applications and infrastructure that power your business. Windows Server 2019 Standard edition is ideal for those with physical or minimally virtualized environments. Each purchase includes 16 core licenses and 10 CALs. A minimum of 16 core licenses is required per server. If your server has more than 16 cores, you'll need to buy additional licenses. You'll also need a Windows Server Client Access Licenses (CAL) for every user or device accessing the server.