Introduction Windows Server 2016 remains a workhorse in data centers and small-to-medium businesses (SMBs) worldwide. It is stable, secure, and feature-rich. However, one long-standing limitation frustrates many administrators: the default restriction of two concurrent Remote Desktop Protocol (RDP) sessions for administrative purposes.
If you truly need multi-user RDP, budget for RDS CALs. But for the tinkerer and the budget-conscious lab admin, the termsrv.dll patch lives on as a clever, if unsanctioned, solution. Q: Does the termsrv.dll patch work on Windows Server 2016 Core? A: No – Server Core has no GUI RDP support. The patch is irrelevant. termsrv.dll patch windows server 2016
net stop TermService copy C:\Backup\termsrv_original.dll C:\Windows\System32\termsrv.dll net start TermService Run sfc /scannow – but note that SFC may not replace the DLL if it finds a checksum mismatch without a valid Windows image. Introduction Windows Server 2016 remains a workhorse in