Windows Server 2019 Standard
Windows Server Standard 2019 is suitable for small and medium businesses, that does not have high virtualisation needs. This edition allows you to use up to 2 Virtual Machines with 1 Hyper-V host for each license. If you want to add 2 more virtual machines, you have to license all the cores in the server again.
Windows Server 2019 Standard enables you to modernize apps quickly, and download them faster, while enhancing the support system. However, this edition allows you to use only Windows containers, but you can use an unlimited number of such containers.
The Standard edition also lacks Host Guardian Hyper-V Support and thus does not ensure that the hoster knows about the Hyper-V hosts. Also, it does not allow you to manage the keys required to start shielded virtual machines.
This Windows Server 2019 Standard edition is also equipped with a Storage Replication; limited to 1 partnership and 1 resource group. It allows the customers to replicate a single volume of data up to 2 TB.
You can activate this edition as a guest only if you are hosted on the Datacenter edition. Also, the Standard edition lacks features like Software-defined Networking (which is responsible for enabling you to manage your network efficiently and monitor and improve its performance) and Storage Spaces Direct (responsible for creating a highly-available software-defined storage at a lower cost through the use of industry-standard servers along with local-attached drives).
