Buy Windows Server RDS
Windows Server RDS CAL (Terminal License) - This license gives users access to server features over RDP. This license is of two types: "Per User" and "Per Device". Per user - this means that it does not matter from which device the user comes in, access for him is carried out by account. The "Per device" license has its own nuances in terms of activation requirements, you can find them in the next article. Access "Per device" gives the user access to the server only from a specific device (computer).
Why buy Windows Server CAL?
Without a Windows Server Cal terminal license, only 2 users can connect to the server at the same time, if you need more advanced access with a large number of simultaneous connections, then you need a Windows Server CAL license.