Enable a TLS 1.3 security feature for local trust anchors (obsolete)
Verified with Microsoft Edge 152.0.4191.53 — updated on July 10, 2026
Supported on: Microsoft Edge version 81-85, Windows 7 or later
Path in the GPO console
Computer Configuration\Administrative Templates\Microsoft Edge User Configuration\Administrative Templates\Microsoft Edge Description
OBSOLETE: This policy is obsolete and doesn't work after Microsoft Edge 85. This policy doesn't work because it was only intended to be a short-term mechanism to give enterprises more time to upgrade affected proxies. This policy controls a security feature in TLS 1.3 that protects connections against downgrade attacks. It's backwards-compatible and doesn't affect connections to compliant TLS 1.2 servers or proxies. However, older versions of some TLS-intercepting proxies have an implementation flaw which causes them to be incompatible. If you enable or don't configure this policy, Microsoft Edge enables these security protections for all connections. If you disable this policy, Microsoft Edge disables these security protections for connections authenticated with locally-installed CA certificates. These protections are always enabled for connections authenticated with publicly-trusted CA certificates. This policy can be used to test for any affected proxies and upgrade them. Affected proxies are expected to fail connections with an error code of ERR_TLS13_DOWNGRADE_DETECTED.
Registry
Software\Policies\Microsoft\Edge Software\Policies\Microsoft\Edge Value name: TLS13HardeningForLocalAnchorsEnabled
Enabled: TLS13HardeningForLocalAnchorsEnabled = 1
Disabled: TLS13HardeningForLocalAnchorsEnabled = 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. ⓘ
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 a TLS 1.3 security feature for local trust anchors (obsolete)
; State: Enabled
; Scope: Computer (HKLM)
; Supported on: Microsoft Edge version 81-85, Windows 7 or later
[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Edge]
"TLS13HardeningForLocalAnchorsEnabled"=dword:00000001More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Enable a TLS 1.3 security feature for local trust anchors (obsolete)
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 81-85, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'TLS13HardeningForLocalAnchorsEnabled' -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: Enable a TLS 1.3 security feature for local trust anchors (obsolete)
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 81-85, 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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Edge' -Name 'TLS13HardeningForLocalAnchorsEnabled' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Enable a TLS 1.3 security feature for local trust anchors (obsolete)
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 81-85, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'TLS13HardeningForLocalAnchorsEnabled' -Value 1 -Type DWordSCCM scripts
# Exported from gporais.com
# Policy: Enable a TLS 1.3 security feature for local trust anchors (obsolete)
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 81-85, 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 a TLS 1.3 security feature for local trust anchors (obsolete)
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 81-85, 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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Edge' -Name 'TLS13HardeningForLocalAnchorsEnabled' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Enable a TLS 1.3 security feature for local trust anchors (obsolete)
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 81-85, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'TLS13HardeningForLocalAnchorsEnabled' -Value 1 -Type DWordBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.