Allows a maximum of two concurrent sessions strictly for server management.
Open regedit and check: HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server fDenyTSConnections should be 0 . (If AllowMultipleTSSessions exists, set to 1 .)
Remote Desktop must be turned on in System Properties. Step-by-Step Procedure termsrv.dll patch windows server 2016
For environments looking to enable multi-session capabilities without immediately purchasing CALs—often for testing, development, or small-team scenarios—a "termsrv.dll patch" is a commonly sought-after, albeit unofficial, solution.
You must have full administrative privileges. How to Patch termsrv.dll on Windows Server 2016 (Steps) Allows a maximum of two concurrent sessions strictly
is a PowerShell script that automates the entire patching process. It supports Windows Server 2016 (as well as 2019, 2022, and client versions Windows 7/10/11). The script:
Obtain a patched version of termsrv.dll specifically for your build of Windows Server 2016 (1607). It supports Windows Server 2016 (as well as
icacls C:\Windows\System32\termsrv.dll /grant Administrators:F Use code with caution. Step 3: Stop the Remote Desktop Service
A community-developed PowerShell script that disables the Terminal Services service, backs up the original file, and then overwrites termsrv.dll with a pre-patched version. It supports Windows 7, 10, 11, Server 2016, Server 2019, and Server 2022.