Enabling multiple simultaneous RDP sessions on Windows Server 2012 R2 can be achieved via native Group Policy configurations, specifically by disabling single-session restrictions, which is safer than patching system files. If deeper customization is required, the Universal Termsrv.dll patch or RDP Wrapper Library can be used, though these carry potential stability risks. For a step-by-step guide on the native configuration method, see Database Mart . stascorp/rdpwrap: RDP Wrapper Library - GitHub
HKLM\SYSTEM\CurrentControlSet\TermServRdpWrapperThe is an unofficial modification tool, originally created by a developer known as DeepXW , designed to remove the concurrent Remote Desktop (RDP) session limits in Windows operating systems . While often discussed for consumer editions like Windows 7 or 10, it is frequently used on Windows Server 2012 R2 to bypass the requirement for Remote Desktop Services (RDS) Client Access Licenses (CALs). Core Functionality universal termsrvdll patch windows server 2012 r2 top