Diagnoser | Remote Desktop Licensing
licdiag /verbose > C:\RDS_Licensing_Report.txt Or for users (gather equivalent info):
HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server\RCM\GracePeriod To generate a machine-readable full report: remote desktop licensing diagnoser
HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server\RCM\LicensingMode (2 = Per Device, 4 = Per User) licdiag /verbose > C:\RDS_Licensing_Report
HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server\RCM\LicensingName licdiag /verbose >