Enable Microsoft SmartScreen checks for MSIX Packages
Verified with Windows 11 25H2 — updated on September 15, 2026 Supported on: At least Windows 11 Version 24H2
Shipped in a Windows update: not in the official ADMX package (Administrative Templates (.admx) for Windows 11 Oct 2025 Update), present no later than KB5124008 (build 26200.9445).
Path in the GPO console
Computer Configuration\Administrative Templates\Windows Components\App Package Deployment Registry
HKLM
Software\Policies\Microsoft\Windows\Appx\ - Value name:
-
EnableMsixSmartScreenCheckREG_DWORD - Enabled:
1- Disabled:
0
Description
This policy controls whether Microsoft SmartScreen check is performed when installing MSIX packages from specific URL zones. If you enable or do not configure this policy, the package URI will be evaluated with Microsoft SmartScreen before installation. This check is only done for packages that come from the internet. If you disable, Microsoft SmartScreen will not be consulted before installing a package.
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: Enable Microsoft SmartScreen checks for MSIX Packages
; State: Enabled
; Supported on: At least Windows 11 Version 24H2
[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Appx]
"EnableMsixSmartScreenCheck"=dword:00000001More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Enable Microsoft SmartScreen checks for MSIX Packages
# State: Enabled
# Supported on: At least Windows 11 Version 24H2
$path = 'HKLM:\Software\Policies\Microsoft\Windows\Appx'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'EnableMsixSmartScreenCheck' -Value 1 -Type DWordIntune XML
No direct Policy CSP / OMA-URI mapping for this policy. Use the Intune Remediation tab, or ingest the ADMX in Intune.Intune Remediation
# === Detection script ===
# Exported from gporais.com
# Policy: Enable Microsoft SmartScreen checks for MSIX Packages
# State: Enabled
# Supported on: At least Windows 11 Version 24H2
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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Windows\Appx' -Name 'EnableMsixSmartScreenCheck' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Enable Microsoft SmartScreen checks for MSIX Packages
# State: Enabled
# Supported on: At least Windows 11 Version 24H2
$path = 'HKLM:\Software\Policies\Microsoft\Windows\Appx'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'EnableMsixSmartScreenCheck' -Value 1 -Type DWordSCCM scripts
# Exported from gporais.com
# Policy: Enable Microsoft SmartScreen checks for MSIX Packages
# State: Enabled
# Supported on: At least Windows 11 Version 24H2
# 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: Enable Microsoft SmartScreen checks for MSIX Packages
# State: Enabled
# Supported on: At least Windows 11 Version 24H2
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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Windows\Appx' -Name 'EnableMsixSmartScreenCheck' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Enable Microsoft SmartScreen checks for MSIX Packages
# State: Enabled
# Supported on: At least Windows 11 Version 24H2
$path = 'HKLM:\Software\Policies\Microsoft\Windows\Appx'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'EnableMsixSmartScreenCheck' -Value 1 -Type DWordBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.