Termsrv.dll Patch Windows Server 2016 __top__ Jun 2026
, is the main library responsible for managing Remote Desktop Services. By default, Windows Server 2016 allows only two concurrent sessions for administrative purposes. To exceed this without official Remote Desktop Services (RDS) licensing, the file's hex code is modified to trick the system into allowing more users. Microsoft Learn Methods for Patching Manual Hex Editing : This involves finding a specific byte sequence (e.g., 39 81 3C 06 00 00 ) within the DLL using a tool like
If you are currently attempting to patch your server, tell me:
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Right-click termsrv.dll , select Properties , and go to the Details tab. Write down the exact file version (e.g., 10.0.14393.xxxx ). Method 1: Manual Hex Editing (Recommended)
Prioritizing official configuration methods over unauthorized modifications is the most effective way to ensure long-term server security and performance. , is the main library responsible for managing
: While technically possible, this method is a violation of Microsoft's licensing terms and can introduce security vulnerabilities by using unofficial third-party scripts to modify protected system files.
Run RDPConf.exe to verify the state. If the status says and [Fully Supported] , the patch is successful. Microsoft Learn Methods for Patching Manual Hex Editing
Search for the following hex string (common for standard 2016 builds): 39 81 3C 06 00 00 0F 84 B1 7D 02 00 Use code with caution. Replace that string with: B8 00 01 00 00 90 89 81 3C 06 00 00 Use code with caution. Save the modified file.
Disclaimer: Patching termsrv.dll is considered a hack. It bypasses Microsoft licensing compliance and can create system instability.
When you attempt to log in with a third user while two are already active, termsrv.dll checks the licensing policy and blocks the connection. The patch works by modifying this DLL to bypass the check that restricts concurrent sessions. Why Patch Windows Server 2016? The main reasons for patching termsrv.dll include: