Termsrvdll Windows Server 2019 |link|

Beyond licensing, termsrv.dll also handles:

: This policy can be enabled to specify the maximum number of simultaneous RDP connections the server allows, based on the available licenses. termsrvdll windows server 2019

Technical Overview: termsrv.dll in Windows Server 2019 The (Terminal Services DLL) is a critical Microsoft system file located in C:\Windows\System32\ that implements the server-side functionality of the Remote Desktop Protocol (RDP) . In Windows Server 2019, this library manages remote connections, session limits, and user authentication for Remote Desktop Services (RDS). 1. Default Session Limits Beyond licensing, termsrv

After any registry change, restart the service. this library manages remote connections

: This significantly improves the experience for power users in a virtual desktop environment compared to earlier versions that could only utilize a single GPU. 2. Video Encoding Optimizations (H.264/AVC)