None of these keys contain a "magic free counter." Microsoft has moved licensing intelligence into the sppsvc (Software Protection Platform) service, which cannot be tricked by simple DWORD changes.
: Back in the Permissions window, select "Administrators" and check the Full Control box.
Sometimes, the GUI fails to point your Session Host to the License Server. You can manually force this via the registry:
# Check current licensing mode Get-WmiObject -Class "Win32_TerminalServiceSetting" -Namespace "root\cimv2\terminalservices" | Select-Object LicensingMode
Let us assume you find a script online that claims to add a registry key to grant you 999 perpetual licenses. Here is what actually happens: