Termsrvdll Windows Server 2019 Link

: Replacing or modifying this DLL is a common technique used by adversaries to maintain persistence on a host or enable abusable RDP features. How to Enable Multi-Session Legally

If you encounter errors related to this file, such as RDP connection failures, consider these standard fixes: Enabling Multiple Remote Desktop Sessions on Windows 10/11 termsrvdll windows server 2019