Maximum number of concurrent connections to the proxy server for WebSocket requests
Verified with Microsoft Edge 152.0.4191.53 — updated on September 2, 2026
Supported on: Microsoft Edge version 148, Windows 7 or later
Path in the GPO console
Computer Configuration\Administrative Templates\Microsoft Edge User Configuration\Administrative Templates\Microsoft Edge Description
Specifies the maximum number of simultaneous connections to a proxy server for WebSocket requests. To configure limits for non-WebSocket requests, see the 'MaxConnectionsPerProxy' (Maximum number of concurrent connections to the proxy server for non-WebSocket requests) policy. If you don't configure this policy, the default value of 128 is used. Some web applications maintain multiple concurrent connections, such as long-lived or hanging requests. Setting a value lower than the default can cause networking delays when many of these applications are open. Some proxy servers can't handle a high number of concurrent connections per client. In these cases, reducing this value might improve reliability. The supported range is 6 to 256: - Values less than 6 are treated as 6. - Values greater than 256 are treated as 256. When the 'AllowSocketPoolSizeRandomizationForProxies' (Allow socket pool size randomization for proxies) policy is enabled, which is the default, the effective upper limit can be randomized up to 2x the value specified by this policy as a security mechanism. We recommend modifying this value only if required by your proxy server configuration or network environment.
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: Maximum number of concurrent connections to the proxy server for WebSocket requests
; State: Enabled
; Scope: Computer (HKLM)
; Supported on: Microsoft Edge version 148, Windows 7 or later
[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Edge]
"MaxConnectionsPerProxyForWebSocket"=dword:00000006More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Maximum number of concurrent connections to the proxy server for WebSocket requests
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 148, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'MaxConnectionsPerProxyForWebSocket' -Value 6 -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: Maximum number of concurrent connections to the proxy server for WebSocket requests
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 148, 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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Edge' -Name 'MaxConnectionsPerProxyForWebSocket' -Expected 6 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Maximum number of concurrent connections to the proxy server for WebSocket requests
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 148, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'MaxConnectionsPerProxyForWebSocket' -Value 6 -Type DWordSCCM scripts
# Exported from gporais.com
# Policy: Maximum number of concurrent connections to the proxy server for WebSocket requests
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 148, 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: Maximum number of concurrent connections to the proxy server for WebSocket requests
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 148, 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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Edge' -Name 'MaxConnectionsPerProxyForWebSocket' -Expected 6 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Maximum number of concurrent connections to the proxy server for WebSocket requests
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 148, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'MaxConnectionsPerProxyForWebSocket' -Value 6 -Type DWordBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.