Do not allow drive redirection
Verified with Windows 11 25H2 — updated on July 30, 2026
Supported on: At least Windows Server 2003 operating systems or Windows XP Professional
Path in the GPO console
Computer Configuration\Administrative Templates\Windows Components\Remote Desktop Services\Remote Desktop Session Host\Device and Resource Redirection Description
This policy setting specifies whether to prevent the mapping of client drives in a Remote Desktop Services session (drive redirection). By default, an RD Session Host server maps client drives automatically upon connection. Mapped drives appear in the session folder tree in File Explorer or Computer in the format <driveletter> on <computername>. You can use this policy setting to override this behavior. If you enable this policy setting, client drive redirection is not allowed in Remote Desktop Services sessions, and Clipboard file copy redirection is not allowed on computers running Windows XP, Windows Server 2003, Windows Server 2012 (and later) or Windows 8 (and later). If you disable this policy setting, client drive redirection is always allowed. In addition, Clipboard file copy redirection is always allowed if Clipboard redirection is allowed. If you do not configure this policy setting, client drive redirection and Clipboard file copy redirection are not specified at the Group Policy level.
Registry
SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services Value name: fDisableCdm
Enabled: fDisableCdm = 1
Disabled: fDisableCdm = 0
MDM / Intune (CSP)
./Device/Vendor/MSFT/Policy/Config/RemoteDesktopServices/DoNotAllowDriveRedirection 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 drive redirection
; State: Enabled
; Supported on: At least Windows Server 2003 operating systems or Windows XP Professional
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services]
"fDisableCdm"=dword:00000001More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Do not allow drive redirection
# State: Enabled
# Supported on: At least Windows Server 2003 operating systems or Windows XP Professional
$path = 'HKLM:\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'fDisableCdm' -Value 1 -Type DWordIntune XML
OMA-URI: ./Device/Vendor/MSFT/Policy/Config/RemoteDesktopServices/DoNotAllowDriveRedirection
Data type: String
Value:
<enabled/>Intune Remediation
# === Detection script ===
# Exported from gporais.com
# Policy: Do not allow drive redirection
# State: Enabled
# Supported on: At least Windows Server 2003 operating systems or Windows XP Professional
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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services' -Name 'fDisableCdm' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Do not allow drive redirection
# State: Enabled
# Supported on: At least Windows Server 2003 operating systems or Windows XP Professional
$path = 'HKLM:\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'fDisableCdm' -Value 1 -Type DWordSCCM scripts
# Exported from gporais.com
# Policy: Do not allow drive redirection
# State: Enabled
# Supported on: At least Windows Server 2003 operating systems or Windows XP Professional
# 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 drive redirection
# State: Enabled
# Supported on: At least Windows Server 2003 operating systems or Windows XP Professional
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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services' -Name 'fDisableCdm' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Do not allow drive redirection
# State: Enabled
# Supported on: At least Windows Server 2003 operating systems or Windows XP Professional
$path = 'HKLM:\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'fDisableCdm' -Value 1 -Type DWordBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.