If you recently installed a Windows Update (e.g., KB503xxxx), the hex pattern may have changed. You will need to look for updated "ini" strings online. If you'd like to proceed, I can help you: Find the exact hex string for your specific Build Number .
If you proceed anyway, always test in an isolated VM first.
Patching the termsrv.dll file on Windows Server 2022 allows multiple users to log in simultaneously via Remote Desktop (RDP) without requiring a Remote Desktop Services (RDS) license. By default, Windows Server allows two concurrent administrative sessions; this patch removes that limit. ⚠️ Important Considerations termsrvdll patch windows server 2022 free work
If you haven't enabled the RDP role services yet, you need to install them. However, installing the full "Remote Desktop Services" role usually demands a license server within 120 days.
Direct patching requires replacing or altering the byte sequences in termsrv.dll . Because this involves a core system file, it requires administrative ownership and carries a higher risk of breaking your RDP service if done incorrectly. If you recently installed a Windows Update (e
Remember: If a “free patch” for Windows Server 2022 RDP limits appears on a forum or file-sharing site, assume it contains ransomware until proven otherwise. No legitimate software vendor distributes patches via DLL hacks.
$OSBuild = (Get-ItemProperty "HKLM:SOFTWARE\Microsoft\Windows NT\CurrentVersion").CurrentBuild if ($OSBuild -ge 20348) # Windows Server 2022 Builds # Pattern for newer Windows Server 2022 builds $pattern = [regex] '39 81 3C 06 00 00 0F (?:[0-9A-F]2 )400' $bytes = [System.IO.File]::ReadAllBytes($termsrvDllFile) $hex = [System.BitConverter]::ToString($bytes) -replace '-',' ' if ($hex -match $pattern) $match = $matches[0] $position = $hex.IndexOf($match) / 3 # Patch the byte sequence to allow unlimited sessions $bytes[$position + 11] = 0x01 [System.IO.File]::WriteAllBytes($termsrvDllFile, $bytes) Write-Host "Patch applied successfully for Server 2022." else Write-Host "Pattern not found. Your termsrv.dll version may be incompatible or already patched." If you proceed anyway, always test in an isolated VM first
Before you implement a , consider the following:
If you only need to ensure two people can connect without kicking each other off, you can use Group Policy without any file modifications. How to Allow Multiple RDP Sessions on Windows 11 and 10
Windows Server 2022 limits Remote Desktop Services (RDS) to two concurrent administrative sessions by default. If a third user attempts to log in, the system prompts them to disconnect an existing user.
Windows protects this file. You must take ownership to modify it: Navigate to C:\Windows\System32 . Right-click termsrv.dll > > Security > Advanced .