Allow mapping folders into Windows Sandbox
Verified with Windows 11 25H2 — updated on July 30, 2026
Supported on: At least Windows 11 Pro, Enterprise, or Education with Windows Sandbox
Path in the GPO console
Computer Configuration\Administrative Templates\Windows Components\Windows Sandbox Description
This policy setting enables or disables mapping folders into sandbox. If you enable this policy setting, mapping folders from the host into Sandbox will be permitted. If you enable this policy setting and disable write to mapped folders, mapping folders from the host into Sandbox will be permitted, but Sandbox will only have permission to read the files. If you disable this policy setting, mapping folders from the host into Sandbox will not be permitted. If you do not configure this policy setting, mapped folders will be enabled. Note that there may be security implications of exposing folders from the host into the container.
Registry
HKLM
SOFTWARE\Policies\Microsoft\Windows\Sandbox Value name: AllowMappedFolders
Enabled: AllowMappedFolders = 1
Disabled: AllowMappedFolders = 0
MDM / Intune (CSP)
./Device/Vendor/MSFT/Policy/Config/WindowsSandbox/AllowMappedFolders Multiple CSP matches are possible; the first one was selected.
Microsoft Learn documentation Mapping data: Microsoft Learn (CC BY 4.0)
CSP values
-
0- Not allowed. -
1 (Default)- Allowed.
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: Allow mapping folders into Windows Sandbox
; State: Enabled
; Supported on: At least Windows 11 Pro, Enterprise, or Education with Windows Sandbox
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Sandbox]
"AllowMappedFolders"=dword:00000001
"AllowWriteToMappedFolders"=dword:00000001More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Allow mapping folders into Windows Sandbox
# State: Enabled
# Supported on: At least Windows 11 Pro, Enterprise, or Education with Windows Sandbox
$path = 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\Sandbox'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'AllowMappedFolders' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'AllowWriteToMappedFolders' -Value 1 -Type DWordIntune XML
OMA-URI: ./Device/Vendor/MSFT/Policy/Config/WindowsSandbox/AllowMappedFolders
Data type: String
Value:
<enabled/>
<data id="CheckBox_AllowWriteToMappedFolders" value="1"/>Intune Remediation
# === Detection script ===
# Exported from gporais.com
# Policy: Allow mapping folders into Windows Sandbox
# State: Enabled
# Supported on: At least Windows 11 Pro, Enterprise, or Education with Windows Sandbox
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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\Sandbox' -Name 'AllowMappedFolders' -Expected 1 -Kind DWord)
(Test-RegistryValue -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\Sandbox' -Name 'AllowWriteToMappedFolders' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Allow mapping folders into Windows Sandbox
# State: Enabled
# Supported on: At least Windows 11 Pro, Enterprise, or Education with Windows Sandbox
$path = 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\Sandbox'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'AllowMappedFolders' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'AllowWriteToMappedFolders' -Value 1 -Type DWordSCCM scripts
# Exported from gporais.com
# Policy: Allow mapping folders into Windows Sandbox
# State: Enabled
# Supported on: At least Windows 11 Pro, Enterprise, or Education with Windows Sandbox
# 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: Allow mapping folders into Windows Sandbox
# State: Enabled
# Supported on: At least Windows 11 Pro, Enterprise, or Education with Windows Sandbox
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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\Sandbox' -Name 'AllowMappedFolders' -Expected 1 -Kind DWord)
(Test-RegistryValue -Path 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\Sandbox' -Name 'AllowWriteToMappedFolders' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Allow mapping folders into Windows Sandbox
# State: Enabled
# Supported on: At least Windows 11 Pro, Enterprise, or Education with Windows Sandbox
$path = 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\Sandbox'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'AllowMappedFolders' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'AllowWriteToMappedFolders' -Value 1 -Type DWordBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.