Allow pages to send synchronous XHR requests during page dismissal (obsolete)
Verified with Microsoft Edge 152.0.4191.53 — updated on July 10, 2026
Supported on: Microsoft Edge version 79-99, 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OBSOLETE: This policy is obsolete and doesn't work after Microsoft Edge 99. This policy is obsolete because it was only intended to be a short-term mechanism to give enterprises more time to update their web content if and when it was found to be incompatible with the change to disallow synchronous XHR requests during page dismissal. It doesn't work in Microsoft Edge after version 99. This policy lets you specify that a page can send synchronous XHR requests during page dismissal. If you enable this policy, pages can send synchronous XHR requests during page dismissal. If you disable this policy or don't configure this policy, pages aren't allowed to send synchronous XHR requests during page dismissal.
Registry
Software\Policies\Microsoft\Edge Software\Policies\Microsoft\Edge Value name: AllowSyncXHRInPageDismissal
Enabled: AllowSyncXHRInPageDismissal = 1
Disabled: AllowSyncXHRInPageDismissal = 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: Allow pages to send synchronous XHR requests during page dismissal (obsolete)
; State: Enabled
; Scope: Computer (HKLM)
; Supported on: Microsoft Edge version 79-99, Windows 7 or later
[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Edge]
"AllowSyncXHRInPageDismissal"=dword:00000001More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Allow pages to send synchronous XHR requests during page dismissal (obsolete)
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 79-99, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'AllowSyncXHRInPageDismissal' -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: Allow pages to send synchronous XHR requests during page dismissal (obsolete)
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 79-99, 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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Edge' -Name 'AllowSyncXHRInPageDismissal' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Allow pages to send synchronous XHR requests during page dismissal (obsolete)
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 79-99, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'AllowSyncXHRInPageDismissal' -Value 1 -Type DWordSCCM scripts
# Exported from gporais.com
# Policy: Allow pages to send synchronous XHR requests during page dismissal (obsolete)
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 79-99, 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: Allow pages to send synchronous XHR requests during page dismissal (obsolete)
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 79-99, 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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Edge' -Name 'AllowSyncXHRInPageDismissal' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Allow pages to send synchronous XHR requests during page dismissal (obsolete)
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 79-99, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'AllowSyncXHRInPageDismissal' -Value 1 -Type DWordBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.