Enable Ambient Authentication for InPrivate and Guest profiles
Verified with Microsoft Edge 152.0.4191.53 — updated on July 10, 2026
Supported on: Microsoft Edge version 81, Windows 7 or later
Path in the GPO console
Computer Configuration\Administrative Templates\Microsoft Edge User Configuration\Administrative Templates\Microsoft Edge Description
Configures this policy to allow/disallow ambient authentication for InPrivate and Guest profiles in Microsoft Edge. Ambient Authentication is http authentication with default credentials when explicit credentials aren't provided via New Technology LAN Manager (NTLM)/Kerberos/Negotiate challenge/response schemes. If you set the policy to 'RegularOnly', it allows ambient authentication for Regular sessions only. InPrivate and Guest sessions aren't allowed to ambiently authenticate. If you set the policy to 'InPrivateAndRegular', it allows ambient authentication for InPrivate and Regular sessions. Guest sessions aren't allowed to ambiently authenticate. If you set the policy to 'GuestAndRegular', it allows ambient authentication for Guest and Regular sessions. InPrivate sessions aren't allowed to ambiently authenticate If you set the policy to 'All', it allows ambient authentication for all sessions. Ambient authentication is always allowed on regular profiles. In Microsoft Edge version 81 and later, if you don't configure this policy, ambient authentication is enabled in regular sessions only. Policy options mapping: * RegularOnly (0) = Enable ambient authentication in regular sessions only * InPrivateAndRegular (1) = Enable ambient authentication in InPrivate and regular sessions * GuestAndRegular (2) = Enable ambient authentication in guest and regular sessions * All (3) = Enable ambient authentication in regular, InPrivate, and guest sessions Use the preceding information when configuring this policy.
Registry
Software\Policies\Microsoft\Edge Software\Policies\Microsoft\Edge 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. ⓘ
Applying both scopes creates an ambiguous configuration (computer takes precedence over user). Only do this intentionally.
.reg file
Windows Registry Editor Version 5.00
; Exported from gporais.com
; Policy: Enable Ambient Authentication for InPrivate and Guest profiles
; State: Enabled
; Scope: Computer (HKLM)
; Supported on: Microsoft Edge version 81, Windows 7 or later
[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Edge]
"AmbientAuthenticationInPrivateModesEnabled"=dword:00000000More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Enable Ambient Authentication for InPrivate and Guest profiles
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 81, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'AmbientAuthenticationInPrivateModesEnabled' -Value 0 -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 Ambient Authentication for InPrivate and Guest profiles
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 81, Windows 7 or later
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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Edge' -Name 'AmbientAuthenticationInPrivateModesEnabled' -Expected 0 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Enable Ambient Authentication for InPrivate and Guest profiles
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 81, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'AmbientAuthenticationInPrivateModesEnabled' -Value 0 -Type DWordSCCM scripts
# Exported from gporais.com
# Policy: Enable Ambient Authentication for InPrivate and Guest profiles
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 81, Windows 7 or later
# 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 Ambient Authentication for InPrivate and Guest profiles
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 81, Windows 7 or later
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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Edge' -Name 'AmbientAuthenticationInPrivateModesEnabled' -Expected 0 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Enable Ambient Authentication for InPrivate and Guest profiles
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 81, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'AmbientAuthenticationInPrivateModesEnabled' -Value 0 -Type DWordBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.