Automatically grant sites permission to connect to USB serial devices
Verified with Microsoft Edge 152.0.4191.53 — updated on July 12, 2026
Supported on: Microsoft Edge version 97, 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
Setting the policy lets you list sites that are automatically granted permission to access USB serial devices with vendor and product IDs that match the vendor_id and product_id fields. Optionally you can omit the product_id field. This enables site access to the vendor's devices. When you provide a product ID, then you give the site access to a specific device from the vendor but not all devices. The URLs must be valid, or the policy is ignored. Only the origin (scheme, host, and port) of the URL is considered. This policy overrides 'DefaultSerialGuardSetting' (Control use of the Serial API), 'SerialAskForUrls' (Allow the Serial API on specific sites), 'SerialBlockedForUrls' (Block the Serial API on specific sites), and the user's preferences. This policy only affects access to USB devices through the Web Serial API. To grant access to USB devices through the WebUSB API, see the 'WebUsbAllowDevicesForUrls' (Grant access to specific sites to connect to specific USB devices) policy. Example value: [ { "devices": [ { "product_id": 5678, "vendor_id": 1234 } ], "urls": [ "https://specific-device.example.com" ] }, { "devices": [ { "vendor_id": 1234 } ], "urls": [ "https://all-vendor-devices.example.com" ] } ]
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: Automatically grant sites permission to connect to USB serial devices
; State: Enabled
; Scope: Computer (HKLM)
; Supported on: Microsoft Edge version 97, Windows 7 or later
[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Edge]
"SerialAllowUsbDevicesForUrls"=""More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Automatically grant sites permission to connect to USB serial devices
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 97, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'SerialAllowUsbDevicesForUrls' -Value '' -Type StringIntune 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: Automatically grant sites permission to connect to USB serial devices
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 97, 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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Edge' -Name 'SerialAllowUsbDevicesForUrls' -Expected '' -Kind String)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Automatically grant sites permission to connect to USB serial devices
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 97, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'SerialAllowUsbDevicesForUrls' -Value '' -Type StringSCCM scripts
# Exported from gporais.com
# Policy: Automatically grant sites permission to connect to USB serial devices
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 97, 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: Automatically grant sites permission to connect to USB serial devices
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 97, 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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Edge' -Name 'SerialAllowUsbDevicesForUrls' -Expected '' -Kind String)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Automatically grant sites permission to connect to USB serial devices
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 97, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'SerialAllowUsbDevicesForUrls' -Value '' -Type StringBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.