Allow files to download and save to the host operating system from Microsoft Defender Application Guard
Verified with Windows 11 25H2 — updated on July 16, 2026
Supported on: Microsoft Edge on Windows 10 Enterprise or Windows 10 Education with Microsoft Defender Application Guard in Enterprise mode
Path in the GPO console
Computer Configuration\Administrative Templates\Windows Components\Microsoft Defender Application Guard Description
This policy setting determines whether to save downloaded files to the host operating system from the Microsoft Defender Application Guard container. If you enable this setting, people can save downloaded files from the Microsoft Defender Application Guard container to the host operating system. If you disable or don't configure this setting, people can't save downloaded files from the Microsoft Defender Application Guard container to the host operating system.
Registry
HKLM
SOFTWARE\Policies\Microsoft\AppHVSI Value name: SaveFilesToHost
Enabled: SaveFilesToHost = 1
Disabled: SaveFilesToHost = 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: Allow files to download and save to the host operating system from Microsoft Defender Application Guard
; State: Enabled
; Supported on: Microsoft Edge on Windows 10 Enterprise or Windows 10 Education with Microsoft Defender Application Guard in Enterprise mode
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\AppHVSI]
"SaveFilesToHost"=dword:00000001More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Allow files to download and save to the host operating system from Microsoft Defender Application Guard
# State: Enabled
# Supported on: Microsoft Edge on Windows 10 Enterprise or Windows 10 Education with Microsoft Defender Application Guard in Enterprise mode
$path = 'HKLM:\SOFTWARE\Policies\Microsoft\AppHVSI'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'SaveFilesToHost' -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: Allow files to download and save to the host operating system from Microsoft Defender Application Guard
# State: Enabled
# Supported on: Microsoft Edge on Windows 10 Enterprise or Windows 10 Education with Microsoft Defender Application Guard in Enterprise mode
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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\SOFTWARE\Policies\Microsoft\AppHVSI' -Name 'SaveFilesToHost' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Allow files to download and save to the host operating system from Microsoft Defender Application Guard
# State: Enabled
# Supported on: Microsoft Edge on Windows 10 Enterprise or Windows 10 Education with Microsoft Defender Application Guard in Enterprise mode
$path = 'HKLM:\SOFTWARE\Policies\Microsoft\AppHVSI'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'SaveFilesToHost' -Value 1 -Type DWordSCCM scripts
# Exported from gporais.com
# Policy: Allow files to download and save to the host operating system from Microsoft Defender Application Guard
# State: Enabled
# Supported on: Microsoft Edge on Windows 10 Enterprise or Windows 10 Education with Microsoft Defender Application Guard in Enterprise mode
# 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 files to download and save to the host operating system from Microsoft Defender Application Guard
# State: Enabled
# Supported on: Microsoft Edge on Windows 10 Enterprise or Windows 10 Education with Microsoft Defender Application Guard in Enterprise mode
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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\SOFTWARE\Policies\Microsoft\AppHVSI' -Name 'SaveFilesToHost' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Allow files to download and save to the host operating system from Microsoft Defender Application Guard
# State: Enabled
# Supported on: Microsoft Edge on Windows 10 Enterprise or Windows 10 Education with Microsoft Defender Application Guard in Enterprise mode
$path = 'HKLM:\SOFTWARE\Policies\Microsoft\AppHVSI'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'SaveFilesToHost' -Value 1 -Type DWordBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.