Limit outstanding packets
Verified with Windows 11 25H2 — updated on July 30, 2026
Supported on: At least Windows Server 2003 operating systems or Windows XP Professional
Path in the GPO console
Computer Configuration\Administrative Templates\Network\QoS Packet Scheduler Description
Specifies the maximum number of outstanding packets permitted on the system. When the number of outstanding packets reaches this limit, the Packet Scheduler postpones all submissions to network adapters until the number falls below this limit. "Outstanding packets" are packets that the Packet Scheduler has submitted to a network adapter for transmission, but which have not yet been sent. If you enable this setting, you can limit the number of outstanding packets. If you disable this setting or do not configure it, then the setting has no effect on the system. Important: If the maximum number of outstanding packets is specified in the registry for a particular network adapter, this setting is ignored when configuring that network adapter.
Registry
Software\Policies\Microsoft\Windows\Psched MDM / Intune (CSP)
./Device/Vendor/MSFT/Policy/Config/ADMX_QOS/QosMaxOutstandingSends Microsoft Learn documentation Mapping data: Microsoft Learn (CC BY 4.0)
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. ⓘ
.reg file
Windows Registry Editor Version 5.00
; Exported from gporais.com
; Policy: Limit outstanding packets
; State: Enabled
; Supported on: At least Windows Server 2003 operating systems or Windows XP Professional
[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Psched]
"MaxOutstandingSends"=dword:0000ffffMore formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Limit outstanding packets
# State: Enabled
# Supported on: At least Windows Server 2003 operating systems or Windows XP Professional
$path = 'HKLM:\Software\Policies\Microsoft\Windows\Psched'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'MaxOutstandingSends' -Value 65535 -Type DWordIntune XML
OMA-URI: ./Device/Vendor/MSFT/Policy/Config/ADMX_QOS/QosMaxOutstandingSends
Data type: String
Value:
<enabled/>
<data id="QosMaxOutstandingSends_Box" value="65535"/>Intune Remediation
# === Detection script ===
# Exported from gporais.com
# Policy: Limit outstanding packets
# State: Enabled
# Supported on: At least Windows Server 2003 operating systems or Windows XP Professional
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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Windows\Psched' -Name 'MaxOutstandingSends' -Expected 65535 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Limit outstanding packets
# State: Enabled
# Supported on: At least Windows Server 2003 operating systems or Windows XP Professional
$path = 'HKLM:\Software\Policies\Microsoft\Windows\Psched'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'MaxOutstandingSends' -Value 65535 -Type DWordSCCM scripts
# Exported from gporais.com
# Policy: Limit outstanding packets
# State: Enabled
# Supported on: At least Windows Server 2003 operating systems or Windows XP Professional
# 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: Limit outstanding packets
# State: Enabled
# Supported on: At least Windows Server 2003 operating systems or Windows XP Professional
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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Windows\Psched' -Name 'MaxOutstandingSends' -Expected 65535 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Limit outstanding packets
# State: Enabled
# Supported on: At least Windows Server 2003 operating systems or Windows XP Professional
$path = 'HKLM:\Software\Policies\Microsoft\Windows\Psched'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'MaxOutstandingSends' -Value 65535 -Type DWordBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.