Disable third-party storage partitioning for specific top-level origins (obsolete)
Verified with Microsoft Edge 152.0.4191.53 — updated on July 10, 2026
Supported on: Microsoft Edge version 115-145, Windows 7 or later
Path in the GPO console
Computer Configuration\Administrative Templates\Microsoft Edge\Content settings User Configuration\Administrative Templates\Microsoft Edge\Content settings Description
OBSOLETE: This policy is obsolete and doesn't work after Microsoft Edge 145. This policy lets you set a list of URL patterns that specify top-level origins for which third-party storage partitioning (partitioning of cross-origin iframe storage) should be disabled. If this policy isn't set or a top-level origin doesn't match one of the URL patterns, then the value from 'DefaultThirdPartyStoragePartitioningSetting' (Default setting for third-party storage partitioning) will be used. Note that the patterns you list are treated as origins, not URLs, so you shouldn't specify a path. For detailed information about valid origin patterns, see https://go.microsoft.com/fwlink/?linkid=2095322. This feature has been removed starting in Microsoft Edge version 146. To ensure compatibility, use the requestStorageAccess method instead. For more information, see https://developer.mozilla.org/en-us/docs/Web/API/Document/requestStorageAccess. Example value: www.example.com [*.]example.edu
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: Disable third-party storage partitioning for specific top-level origins (obsolete)
; State: Enabled
; Scope: Computer (HKLM)
; Supported on: Microsoft Edge version 115-145, Windows 7 or later
[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Edge\ThirdPartyStoragePartitioningBlockedForOrigins]
; List values: enter one value per line in the builder UI.More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Disable third-party storage partitioning for specific top-level origins (obsolete)
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 115-145, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge\ThirdPartyStoragePartitioningBlockedForOrigins'
New-Item -Path $path -Force | Out-Null
# List values: enter one value per line in the builder UI.Intune 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: Disable third-party storage partitioning for specific top-level origins (obsolete)
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 115-145, 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
}
# HKLM:\Software\Policies\Microsoft\Edge\ThirdPartyStoragePartitioningBlockedForOrigins: List values: enter one value per line in the builder UI.
# No testable registry values are available for this state.
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Disable third-party storage partitioning for specific top-level origins (obsolete)
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 115-145, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge\ThirdPartyStoragePartitioningBlockedForOrigins'
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: Disable third-party storage partitioning for specific top-level origins (obsolete)
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 115-145, 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: Disable third-party storage partitioning for specific top-level origins (obsolete)
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 115-145, 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
}
# HKLM:\Software\Policies\Microsoft\Edge\ThirdPartyStoragePartitioningBlockedForOrigins: List values: enter one value per line in the builder UI.
# No testable registry values are available for this state.
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Disable third-party storage partitioning for specific top-level origins (obsolete)
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 115-145, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge\ThirdPartyStoragePartitioningBlockedForOrigins'
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.