Re-enable deprecated web platform features for a limited time (obsolete)

Computer and userIntune-readyEnableDeprecatedWebPlatformFeatures

Supported on Microsoft Edge version 77-86, Windows 7 or later

155.0.4283.62

What it does

OBSOLETE: This policy is obsolete and doesn't work after Microsoft Edge 86. This policy is obsolete because dedicated web platform policies are now used to manage individual web platform feature deprecations. Specify a list of deprecated web platform features to temporarily re-enable. This policy lets you re-enable deprecated web platform features for a limited time. Features are identified by a string tag. If you don't configure this policy, if the list is empty, or if a feature doesn't match one of the supported string tags, all deprecated web platform features remain disabled. While the policy itself is supported on the above platforms, the feature it's enabling might not be available on all of those platforms. Not all deprecated Web Platform features can be re-enabled. Only the following explicitly listed features can be re-enabled, and only for a limited period of time, which differs per feature. You can review the intent behind the Web Platform feature changes at https://bit.ly/blinkintents. The general format of the string tag is [DeprecatedFeatureName]_EffectiveUntil[yyyymmdd]. Policy options mapping: * ExampleDeprecatedFeature (ExampleDeprecatedFeature_EffectiveUntil20080902) = Enable ExampleDeprecatedFeature API through 2008/09/02 Use the preceding information when configuring this policy. Example value: ExampleDeprecatedFeature_EffectiveUntil20080902

What it writes

Hive: HKEY_LOCAL_MACHINE or HKEY_CURRENT_USER
Registry key: Software\Policies\Microsoft\Edge

Options

Option	Type	Registry value	Allowed values
Re-enable deprecated web platform features for a limited time	List of values	`Software\Policies\Microsoft\Edge\EnableDeprecatedWebPlatformFeatures`	Any

Configure and deploy

Choose a state and the option values; the output below is generated from the template for exactly that.

Enabled · Computer · template defaults

Registry file (.reg)

Windows Registry Editor Version 5.00

[-HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Edge\EnableDeprecatedWebPlatformFeatures]

PowerShell

$ErrorActionPreference = 'Stop'

function Set-RegistryValue {
    param(
        [Parameter(Mandatory = $true)][string] $Path,
        [Parameter(Mandatory = $true)][string] $Name,
        [Parameter(Mandatory = $true)][string] $PropertyType,
        [Parameter(Mandatory = $true)][object] $Value
    )

    if (-not (Test-Path -LiteralPath $Path)) {
        New-Item -Path $Path -Force | Out-Null
    }

    New-ItemProperty -LiteralPath $Path -Name $Name -PropertyType $PropertyType -Value $Value -Force | Out-Null
}

function Remove-RegistryValue {
    param(
        [Parameter(Mandatory = $true)][string] $Path,
        [Parameter(Mandatory = $true)][string] $Name
    )

    if (Test-Path -LiteralPath $Path) {
        Remove-ItemProperty -LiteralPath $Path -Name $Name -Force -ErrorAction SilentlyContinue
    }
}

function Clear-RegistryKeyValues {
    param(
        [Parameter(Mandatory = $true)][string] $Path
    )

    if (-not (Test-Path -LiteralPath $Path)) {
        return
    }

    foreach ($propertyName in (Get-Item -LiteralPath $Path).Property) {
        Remove-ItemProperty -LiteralPath $Path -Name $propertyName -Force -ErrorAction SilentlyContinue
    }
}

# Policy: Re-enable deprecated web platform features for a limited time (obsolete)
# Name: EnableDeprecatedWebPlatformFeatures
# Scope: Machine
# State: Enabled
# Source: msedge.admx

Clear-RegistryKeyValues -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Edge\EnableDeprecatedWebPlatformFeatures'

The OMA-URI is an inferred ADMX-backed Policy CSP candidate derived from the source ADMX file name and policy name.
Some Microsoft policies use built-in Policy CSP pages whose area names don't match the ADMX file name, so verify the candidate against Microsoft Learn before deployment.
The generated payload is incomplete because one or more ADMX element values were not supplied: EnableDeprecatedWebPlatformFeaturesDesc

ADMX profile candidate (OMA-URI)

./Device/Vendor/MSFT/Policy/Config/ADMX_msedge/EnableDeprecatedWebPlatformFeatures

Intune remediation scripts

Detection

$ErrorActionPreference = 'Stop'
$reasons = [System.Collections.Generic.List[string]]::new()

function Test-RegistryValueExists {
    param(
        [Parameter(Mandatory = $true)][string] $Path,
        [Parameter(Mandatory = $true)][string] $Name
    )

    if (-not (Test-Path -LiteralPath $Path)) {
        return $false
    }

    return $null -ne (Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction SilentlyContinue)
}

function Test-RegistryValueEquals {
    param(
        [Parameter(Mandatory = $true)][string] $Path,
        [Parameter(Mandatory = $true)][string] $Name,
        [Parameter(Mandatory = $true)][string] $Kind,
        [Parameter(Mandatory = $true)][object] $Expected
    )

    if (-not (Test-Path -LiteralPath $Path)) {
        return $false
    }

    $valueObject = Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction SilentlyContinue
    if ($null -eq $valueObject) {
        return $false
    }

    $actual = $valueObject.$Name
    switch ($Kind) {
        'String' { return [string]$actual -ceq [string]$Expected }
        'ExpandString' { return [string]$actual -ceq [string]$Expected }
        'DWord' { return [uint32]$actual -eq [uint32]$Expected }
        'QWord' { return [uint64]$actual -eq [uint64]$Expected }
        'MultiString' {
            $actualArray = @($actual)
            $expectedArray = @($Expected)
            if ($actualArray.Count -ne $expectedArray.Count) { return $false }
            for ($index = 0; $index -lt $actualArray.Count; $index++) {
                if ([string]$actualArray[$index] -cne [string]$expectedArray[$index]) { return $false }
            }
            return $true
        }
        'Binary' {
            $actualArray = [byte[]]$actual
            $expectedArray = [byte[]]$Expected
            if ($actualArray.Length -ne $expectedArray.Length) { return $false }
            for ($index = 0; $index -lt $actualArray.Length; $index++) {
                if ($actualArray[$index] -ne $expectedArray[$index]) { return $false }
            }
            return $true
        }
        default { return [string]$actual -ceq [string]$Expected }
    }
}

# Policy: Re-enable deprecated web platform features for a limited time (obsolete)
# Name: EnableDeprecatedWebPlatformFeatures
# Scope: Machine
# State: Enabled
# Source: msedge.admx

$keyPath = 'Registry::HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Edge\EnableDeprecatedWebPlatformFeatures'
if (Test-Path -LiteralPath $keyPath) {
    $propertyNames = (Get-Item -LiteralPath $keyPath).Property
    if ($propertyNames.Count -gt 0) {
        $reasons.Add('Key should be empty: HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Edge\EnableDeprecatedWebPlatformFeatures') | Out-Null
    }
}

if ($reasons.Count -eq 0) {
    Write-Output 'Compliant'
    exit 0
}

$reasons | ForEach-Object { Write-Output $_ }
exit 1

Remediation

$ErrorActionPreference = 'Stop'

function Set-RegistryValue {
    param(
        [Parameter(Mandatory = $true)][string] $Path,
        [Parameter(Mandatory = $true)][string] $Name,
        [Parameter(Mandatory = $true)][string] $PropertyType,
        [Parameter(Mandatory = $true)][object] $Value
    )

    if (-not (Test-Path -LiteralPath $Path)) {
        New-Item -Path $Path -Force | Out-Null
    }

    New-ItemProperty -LiteralPath $Path -Name $Name -PropertyType $PropertyType -Value $Value -Force | Out-Null
}

function Remove-RegistryValue {
    param(
        [Parameter(Mandatory = $true)][string] $Path,
        [Parameter(Mandatory = $true)][string] $Name
    )

    if (Test-Path -LiteralPath $Path) {
        Remove-ItemProperty -LiteralPath $Path -Name $Name -Force -ErrorAction SilentlyContinue
    }
}

function Clear-RegistryKeyValues {
    param(
        [Parameter(Mandatory = $true)][string] $Path
    )

    if (-not (Test-Path -LiteralPath $Path)) {
        return
    }

    foreach ($propertyName in (Get-Item -LiteralPath $Path).Property) {
        Remove-ItemProperty -LiteralPath $Path -Name $propertyName -Force -ErrorAction SilentlyContinue
    }
}

# Policy: Re-enable deprecated web platform features for a limited time (obsolete)
# Name: EnableDeprecatedWebPlatformFeatures
# Scope: Machine
# State: Enabled
# Source: msedge.admx

Clear-RegistryKeyValues -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Edge\EnableDeprecatedWebPlatformFeatures'

History 37 retained releases

150.0.4078.8016 Jul 2026
- Already present in the first release ChangeIntel keeps.

36 later releases left it unchanged.

Template

Internal name: EnableDeprecatedWebPlatformFeatures
Namespace: Microsoft.Policies.Edge
Template file: msedge.admx
Release: Microsoft Edge 155.0.4283.62 · file set 0a733b0040dbbf02…

Definition, editor controls and support

Definition

<policy class="Both" displayName="$(string.EnableDeprecatedWebPlatformFeatures)" explainText="$(string.EnableDeprecatedWebPlatformFeatures_Explain)" key="Software\Policies\Microsoft\Edge" name="EnableDeprecatedWebPlatformFeatures" presentation="$(presentation.EnableDeprecatedWebPlatformFeatures)" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions">
      <parentCategory ref="Microsoft.Policies.Edge:microsoft_edge" />
      <supportedOn ref="Microsoft.Policies.Edge:OBSOLETE_WIN7_V77_V86" />
      <elements>
        <list id="EnableDeprecatedWebPlatformFeaturesDesc" key="Software\Policies\Microsoft\Edge\EnableDeprecatedWebPlatformFeatures" valuePrefix="" />
      </elements>
    </policy>

Editor controls

<presentation id="EnableDeprecatedWebPlatformFeatures" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions"><listBox refId="EnableDeprecatedWebPlatformFeaturesDesc">Re-enable deprecated web platform features for a limited time</listBox></presentation>

Supported platforms and category

Microsoft.Policies.Edge:category:microsoft_edge
<category displayName="$(string.microsoft_edge)" name="microsoft_edge" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions" />
Microsoft.Policies.Edge:definition:OBSOLETE_WIN7_V77_V86
<definition displayName="$(string.OBSOLETE_WIN7_V77_V86)" name="OBSOLETE_WIN7_V77_V86" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions" />
Microsoft.Policies.Edge:category:microsoft_edge
<category displayName="$(string.microsoft_edge)" name="microsoft_edge" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions" />
<strings><string id="Microsoft.Policies.Edge:microsoft_edge">Microsoft Edge</string></strings>
Microsoft.Policies.Edge:definition:OBSOLETE_WIN7_V77_V86
<definition displayName="$(string.OBSOLETE_WIN7_V77_V86)" name="OBSOLETE_WIN7_V77_V86" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions" />
<strings><string id="Microsoft.Policies.Edge:OBSOLETE_WIN7_V77_V86">Microsoft Edge version 77-86, Windows 7 or later</string></strings>