Enable App Installer Additional Sources
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 additional sources provided by the enterprise IT administrator. If you do not configure this policy, no additional sources will be configured for the Windows Package Manager. If you enable this policy, the additional sources will be added to the Windows Package Manager and cannot be removed. The representation for each additional source can be obtained from installed sources using 'winget source export'. If you disable this policy, no additional sources can be configured for the Windows Package Manager.
Registry
HKLM
Software\Policies\Microsoft\Windows\AppInstaller Value name: EnableAdditionalSources
Enabled: EnableAdditionalSources = 1
Disabled: EnableAdditionalSources = 0
MDM / Intune (CSP)
./Device/Vendor/MSFT/Policy/Config/DesktopAppInstaller/EnableAdditionalSources 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 Additional Sources
; State: Enabled
; Supported on: At least Windows Server 2016, Windows 10 Version 1809
[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\AppInstaller]
"EnableAdditionalSources"=dword:00000001
[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\AppInstaller\AdditionalSources]
; List values: enter one value per line in the builder UI.More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Enable App Installer Additional Sources
# 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 'EnableAdditionalSources' -Value 1 -Type DWord
$path = 'HKLM:\Software\Policies\Microsoft\Windows\AppInstaller\AdditionalSources'
New-Item -Path $path -Force | Out-Null
# List values: enter one value per line in the builder UI.Intune XML
OMA-URI: ./Device/Vendor/MSFT/Policy/Config/DesktopAppInstaller/EnableAdditionalSources
Data type: String
Value:
<enabled/>
<!-- AdditionalSources: enter one value per line before copying this XML payload. -->Intune Remediation
# === Detection script ===
# Exported from gporais.com
# Policy: Enable App Installer Additional Sources
# 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
}
# HKLM:\Software\Policies\Microsoft\Windows\AppInstaller\AdditionalSources: List values: enter one value per line in the builder UI.
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Windows\AppInstaller' -Name 'EnableAdditionalSources' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Enable App Installer Additional Sources
# 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 'EnableAdditionalSources' -Value 1 -Type DWord
$path = 'HKLM:\Software\Policies\Microsoft\Windows\AppInstaller\AdditionalSources'
New-Item -Path $path -Force | Out-Null
# List values: enter one value per line in the builder UI.SCCM scripts
# Exported from gporais.com
# Policy: Enable App Installer Additional Sources
# 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 Additional Sources
# 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
}
# HKLM:\Software\Policies\Microsoft\Windows\AppInstaller\AdditionalSources: List values: enter one value per line in the builder UI.
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Windows\AppInstaller' -Name 'EnableAdditionalSources' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Enable App Installer Additional Sources
# 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 'EnableAdditionalSources' -Value 1 -Type DWord
$path = 'HKLM:\Software\Policies\Microsoft\Windows\AppInstaller\AdditionalSources'
New-Item -Path $path -Force | Out-Null
# List values: enter one value per line in the builder UI.Building a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.