If you have 5 users, buy them Windows 10/11 Pro workstations. Windows Pro allows 1 remote session natively (Remote Desktop). Combined with Quick Assist or a free VPN, you avoid the RDS CAL ecosystem entirely.
There is no native registry key that says "LicenseEnabled = 1" or "RDS_Free_Connections = 999". Microsoft's licensing mechanism is enforced by the termsrv.dll service and the License Server. While third-party patches (for older, unsupported OS versions like Windows Server 2008/2012) exist online that modify DLLs, these are: rds cal license registry key free
For modern servers (2016, 2019, 2022, 2025), these hacks do not work. If you have 5 users, buy them Windows 10/11 Pro workstations
When the registry is hacked, the Terminal Server service becomes unstable. You will see Event ID 4105: "Remote Desktop Services cannot issue a license." This results in random disconnections every 60 minutes. Users lose work. Productivity dies. For modern servers (2016, 2019, 2022, 2025), these