Set to Enabled and set the maximum number of allowed connections (e.g., 999).
To maintain system integrity, you should return ownership to TrustedInstaller .
This feature is strictly intended for server management, troubleshooting, and administrative maintenance.
Tools like RDP Wrapper Library inject code that modifies termsrv.dll in memory at runtime, leaving the original file untouched. This approach is safer because Windows updates won’t overwrite the original file, but the patch must be reapplied after each server reboot. termsrv.dll patch windows server 2016
Note: If your Windows Server 2016 has recent cumulative updates, the hex patterns might vary slightly. Always cross-reference your specific termsrv.dll version string online if the search sequence returns zero results. Save the file in the hex editor. Step 5: Restart the Services Re-enable the remote desktop infrastructure: net start TermService Use code with caution. Method 2: Using the RDP Wrapper Library (Automated)
You must grant your user account "Full Control" permissions over the file to replace it.
: Using third-party automated patching scripts downloaded from unverified sources exposes your server to potential malware or backdoors. Set to Enabled and set the maximum number
: Future Windows updates can overwrite the patched file, causing RDP to fail.
This keeps the original file intact. However, because Windows updates frequently change termsrv.dll , you must consistently update the RDP Wrapper configuration file ( rdpwrap.ini ) to support newer Windows Server 2016 build versions. Risks, Considerations, and Legal Disclaimers
The patching process typically involves modifying the hex code of the file to remove the "two-user" limit. 1. Preparation Tools like RDP Wrapper Library inject code that
It uses an .ini file to provide the correct offsets for different Windows builds. 3. Automated Scripts
Windows Server 2016 receives monthly security updates [Microsoft 2026]. Keep your system updated to protect against vulnerabilities.
Never use this patch in a production environment, on servers with customer data, or in any scenario requiring compliance (HIPAA, PCI-DSS, SOX).
If you need a reliable, compliant, and permanent multi-user RDP setup on Windows Server 2016, you should install the official Remote Desktop Services role instead of patching system files. Open and click Add roles and features . Select Remote Desktop Services installation . Choose Quick Start or Standard deployment . Select Session-based desktop deployment .