Termsrv.dll Patch Windows Server 2022 -free- -

Below is the most reliable, community-tested method. No third-party “patch .exe” is required—you will apply the hex edit manually or via a simple script.

Instead of patching termsrv.dll, consider these Microsoft-supported options for multiple RDP sessions: Termsrv.dll Patch Windows Server 2022 -FREE-

| Solution | Max Users | Licensing Required | Complexity | |----------|-----------|--------------------|-------------| | RDS Role + RDS CALs | Unlimited | Yes (per user/device) | High | | Windows 10/11 Pro + RDP Wrapper (unofficial) | Limited | No (gray area) | Medium | | Third-party tools (ThinStuff, etc.) | Varies | Paid | Low | | Windows 365 / AVD | Unlimited | Subscription | Medium | Below is the most reliable, community-tested method

Method A – Using a Hex Editor (Manual): Method B – Using PowerShell Script (Automated): $dll

Method B – Using PowerShell Script (Automated):

$dll = "C:\Windows\System32\termsrv.dll"
$bytes = [System.IO.File]::ReadAllBytes($dll)
$pattern = @(0xB8,0x00,0x00,0x02,0x00)
$patch = @(0xB8,0x00,0x00,0x00,0x00)
for ($i=0; $i -lt $bytes.Length -4; $i++) 
$match = $true
for ($j=0; $j -lt 5; $j++)  if ($bytes[$i+$j] -ne $pattern[$j])  $match=$false; break  
if ($match) 
for ($j=0; $j -lt 5; $j++)  $bytes[$i+$j] = $patch[$j] 
Write-Host "Patched at offset 0x$($i.ToString('X'))"
[System.IO.File]::WriteAllBytes($dll, $bytes)
break