This is a 100% Genuine Lifetime product key for Microsoft Windows Server 2016 that adds 50 RDS User CALs. This allows more users to connect to your server. Product key will work on any editions of Windows Server 2016 such as Essentials, Standard or Datacenter. We are not an expert in Windows Server installation so please be sure you know what you are going to do before purchasing as we cannot provide installation assistance with Windows Server purchases. You are purchasing a 100% genuine product license so please utilize Microsoft’s customer assistance instead if you have questions. Note : This Key is for option 50 USER Remote Desktop Service RDS Connection. You should have a Windows server 2016 OS and activate it first, then you can use this key to activate 50 USER RDS Cals. You can’t use this key to activate Windows Server 2016 OS. I also sell key for Windows Server 2016 OS in other lisitng.