Instead of modifying the actual termsrv.dll file on disk, RDP Wrapper acts as a layer between the Service Control Manager and Remote Desktop Services. It loads the original, unmodified termsrv.dll into memory and patches the structures on the fly. How to use RDPWrap:
Restricted to two concurrent sessions strictly for administrative purposes. universal termsrv.dll patch windows server 2012 r2
The Universal Termsrv.dll Patch modifies the binary code inside the termsrv.dll file to remove the hardcoded check for the session count, effectively enabling multiple users to log in simultaneously without installing the official RDS role. Risks and Compliance Issues Instead of modifying the actual termsrv
Modifying this file removes these soft-coded licensing limits. How the Patch Works universal termsrv.dll patch windows server 2012 r2