Do not allow local administrators to customize permissions
Verified with Windows 11 25H2 — updated on July 30, 2026
Supported on: At least Windows Server 2003
Path in the GPO console
Computer Configuration\Administrative Templates\Windows Components\Remote Desktop Services\Remote Desktop Session Host\Security Description
This policy setting specifies whether to disable the administrator rights to customize security permissions for the Remote Desktop Session Host server. You can use this setting to prevent administrators from making changes to the user groups allowed to connect remotely to the RD Session Host server. By default, administrators are able to make such changes. If you enable this policy setting the default security descriptors for existing groups on the RD Session Host server cannot be changed. All the security descriptors are read-only. If you disable or do not configure this policy setting, server administrators have full read/write permissions to the user security descriptors by using the Remote Desktop Session WMI Provider. Note: The preferred method of managing user access is by adding a user to the Remote Desktop Users group.
Registry
SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services Value name: fWritableTSCCPermTab
Enabled: fWritableTSCCPermTab = 0
Disabled: fWritableTSCCPermTab = 1
MDM / Intune (CSP)
./Device/Vendor/MSFT/Policy/Config/ADMX_TerminalServer/TS_TSCC_PERMISSIONS_POLICY Microsoft Learn documentation Mapping data: Microsoft Learn (CC BY 4.0)
Export Builder
BETAConfigure the state, scope and options, then generate .reg, PowerShell, Intune and SCCM outputs — or add the setting to a multi-setting collection.
These exports write the registry — this is not a managed GPO. ⓘ
.reg file
Windows Registry Editor Version 5.00
; Exported from gporais.com
; Policy: Do not allow local administrators to customize permissions
; State: Enabled
; Supported on: At least Windows Server 2003
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services]
"fWritableTSCCPermTab"=dword:00000000More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Do not allow local administrators to customize permissions
# State: Enabled
# Supported on: At least Windows Server 2003
$path = 'HKLM:\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'fWritableTSCCPermTab' -Value 0 -Type DWordIntune XML
OMA-URI: ./Device/Vendor/MSFT/Policy/Config/ADMX_TerminalServer/TS_TSCC_PERMISSIONS_POLICY
Data type: String
Value:
<enabled/>Intune Remediation
# === Detection script ===
# Exported from gporais.com
# Policy: Do not allow local administrators to customize permissions
# State: Enabled
# Supported on: At least Windows Server 2003
function Test-RegistryValue {
param(
[Parameter(Mandatory = $true)][string]$Path,
[Parameter(Mandatory = $true)][string]$Name,
[object]$Expected,
[ValidateSet('String', 'DWord', 'MultiString')][string]$Kind = 'String',
[switch]$Absent
)
try {
$item = Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction Stop
} catch {
return $Absent.IsPresent
}
if ($Absent.IsPresent) { return $false }
$actual = $item.$Name
if ($Kind -eq 'DWord') { return ([int64]$actual) -eq ([int64]$Expected) }
if ($Kind -eq 'MultiString') {
$actualValues = @($actual)
$expectedValues = @($Expected)
if ($actualValues.Count -ne $expectedValues.Count) { return $false }
for ($i = 0; $i -lt $expectedValues.Count; $i++) {
if ([string]$actualValues[$i] -ne [string]$expectedValues[$i]) { return $false }
}
return $true
}
return [string]$actual -eq [string]$Expected
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services' -Name 'fWritableTSCCPermTab' -Expected 0 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Do not allow local administrators to customize permissions
# State: Enabled
# Supported on: At least Windows Server 2003
$path = 'HKLM:\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'fWritableTSCCPermTab' -Value 0 -Type DWordSCCM scripts
# Exported from gporais.com
# Policy: Do not allow local administrators to customize permissions
# State: Enabled
# Supported on: At least Windows Server 2003
# SCCM Configuration Item guidance:
# Create a Configuration Item of type "Setting: Script".
# Discovery script: use the Detection script below.
# Remediation script: use the Remediation script below.
# Compliance rule: the Discovery script output equals 'Compliant'.
# === Detection script ===
# Exported from gporais.com
# Policy: Do not allow local administrators to customize permissions
# State: Enabled
# Supported on: At least Windows Server 2003
function Test-RegistryValue {
param(
[Parameter(Mandatory = $true)][string]$Path,
[Parameter(Mandatory = $true)][string]$Name,
[object]$Expected,
[ValidateSet('String', 'DWord', 'MultiString')][string]$Kind = 'String',
[switch]$Absent
)
try {
$item = Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction Stop
} catch {
return $Absent.IsPresent
}
if ($Absent.IsPresent) { return $false }
$actual = $item.$Name
if ($Kind -eq 'DWord') { return ([int64]$actual) -eq ([int64]$Expected) }
if ($Kind -eq 'MultiString') {
$actualValues = @($actual)
$expectedValues = @($Expected)
if ($actualValues.Count -ne $expectedValues.Count) { return $false }
for ($i = 0; $i -lt $expectedValues.Count; $i++) {
if ([string]$actualValues[$i] -ne [string]$expectedValues[$i]) { return $false }
}
return $true
}
return [string]$actual -eq [string]$Expected
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services' -Name 'fWritableTSCCPermTab' -Expected 0 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Do not allow local administrators to customize permissions
# State: Enabled
# Supported on: At least Windows Server 2003
$path = 'HKLM:\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'fWritableTSCCPermTab' -Value 0 -Type DWordBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.