Thank you for your posting in Windows Server Forum.
The RDS CAL that is issued, resides in HKLM\Software\Microsoft\MSLicensing\Store and PC may not retain this setting on restart. Microsoft RDS CALS can be revoked manually from the RDS Licensing Manager.
Microsoft is conducting an online survey to understand your opinion of the Technet Web site. If you choose to participate, the online survey will be presented to you when you leave the Technet Web site.