Enable App Installer Microsoft Store Source Certificate Validation Bypass
Verified with Windows 11 25H2 — updated on July 30, 2026
Supported on: At least Windows Server 2016, Windows 10 Version 1809
Path in the GPO console
Computer Configuration\Administrative Templates\Windows Components\Desktop App Installer Description
This policy controls whether the Windows Package Manager will validate the Microsoft Store certificate hash matches to a known Microsoft Store certificate when initiating a connection to the Microsoft Store Source. If you enable this policy, the Windows Package Manager will bypass the Microsoft Store certificate validation. If you disable this policy, the Windows Package Manager will validate the Microsoft Store certificate used is valid and belongs to the Microsoft Store before communicating with the Microsoft Store source. If you do not configure this policy, the Windows Package Manager administrator settings will be adhered to.
Registry
HKLM
Software\Policies\Microsoft\Windows\AppInstaller Value name: EnableBypassCertificatePinningForMicrosoftStore
Enabled: EnableBypassCertificatePinningForMicrosoftStore = 1
Disabled: EnableBypassCertificatePinningForMicrosoftStore = 0
MDM / Intune (CSP)
./Device/Vendor/MSFT/Policy/Config/DesktopAppInstaller/EnableBypassCertificatePinningForMicrosoftStore 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: Enable App Installer Microsoft Store Source Certificate Validation Bypass
; State: Enabled
; Supported on: At least Windows Server 2016, Windows 10 Version 1809
[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\AppInstaller]
"EnableBypassCertificatePinningForMicrosoftStore"=dword:00000001More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Enable App Installer Microsoft Store Source Certificate Validation Bypass
# State: Enabled
# Supported on: At least Windows Server 2016, Windows 10 Version 1809
$path = 'HKLM:\Software\Policies\Microsoft\Windows\AppInstaller'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'EnableBypassCertificatePinningForMicrosoftStore' -Value 1 -Type DWordIntune XML
OMA-URI: ./Device/Vendor/MSFT/Policy/Config/DesktopAppInstaller/EnableBypassCertificatePinningForMicrosoftStore
Data type: String
Value:
<enabled/>Intune Remediation
# === Detection script ===
# Exported from gporais.com
# Policy: Enable App Installer Microsoft Store Source Certificate Validation Bypass
# State: Enabled
# Supported on: At least Windows Server 2016, Windows 10 Version 1809
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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Windows\AppInstaller' -Name 'EnableBypassCertificatePinningForMicrosoftStore' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Enable App Installer Microsoft Store Source Certificate Validation Bypass
# State: Enabled
# Supported on: At least Windows Server 2016, Windows 10 Version 1809
$path = 'HKLM:\Software\Policies\Microsoft\Windows\AppInstaller'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'EnableBypassCertificatePinningForMicrosoftStore' -Value 1 -Type DWordSCCM scripts
# Exported from gporais.com
# Policy: Enable App Installer Microsoft Store Source Certificate Validation Bypass
# State: Enabled
# Supported on: At least Windows Server 2016, Windows 10 Version 1809
# 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 App Installer Microsoft Store Source Certificate Validation Bypass
# State: Enabled
# Supported on: At least Windows Server 2016, Windows 10 Version 1809
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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Windows\AppInstaller' -Name 'EnableBypassCertificatePinningForMicrosoftStore' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Enable App Installer Microsoft Store Source Certificate Validation Bypass
# State: Enabled
# Supported on: At least Windows Server 2016, Windows 10 Version 1809
$path = 'HKLM:\Software\Policies\Microsoft\Windows\AppInstaller'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'EnableBypassCertificatePinningForMicrosoftStore' -Value 1 -Type DWordBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.