Windows Server Essentials offers a flexible, inexpensive and easy-to-use small business server solution with up to 25 users and 50 devices. Windows Server Essentials can also be used as the primary server in a multi-server environment for small businesses. Windows Server 2016 Essentials provides a wide range of new and enhanced features and capabilities for Windows Server Essentials that enable small businesses to be more productive. License for server. Licensing Type: OEM