Before activation, please make sure you have installed Windows Server 2019 Datacenter System already on your computer.
Windows Server 2019 Datacenter Key Global is usually used for virtualization as it allows you to put a lot of virtual machines (VMs) on a single physical host. Datacenter, the same as Standard, needs CALs, but it allows for an unlimited number of virtual machines to be executed.
However, the cost of a Datacenter license is approximatively 7 times the cost of a Standard license, so if you are running less 14 VMs on a physical server it is generally less costly to get just the Standard.
Highly virtualized datacenters and cloud environments, Core-based, Windows Server CAL, Pricing Open NL ERP: 6155 USD
Physical or minimally virtualized environments, Core-based, Windows Server CAL, Pricing Open NL ERP: 972 USD
Small businesses with up to 25 users and 50 devices, Specialty servers (server license), No CAL required, Pricing Open NL ERP: 501 USD