Configure extended cloud check
Verified with Windows 11 25H2 — updated on July 30, 2026
Supported on: At least Windows Server 2016, Windows 10
Path in the GPO console
Computer Configuration\Administrative Templates\Windows Components\Microsoft Defender Antivirus\Mp Engine Description
This feature allows Microsoft Defender Antivirus to block a suspicious file for up to 60 seconds, and scan it in the cloud to make sure it's safe. The typical cloud check timeout is 10 seconds. To enable the extended cloud check feature, specify the extended time in seconds, up to an additional 50 seconds. For example, if the desired timeout is 60 seconds, specify 50 seconds in this setting, which will enable the extended cloud check feature, and will raise the total time to 60 seconds. Note: This feature depends on three other MAPS settings - "Configure the 'Block at First Sight' feature; "Join Microsoft MAPS"; "Send file samples when further analysis is required" all need to be enabled.
Registry
HKLM
Software\Policies\Microsoft\Windows Defender\MpEngine Value name: MpBafsExtendedTimeout
MDM / Intune (CSP)
./Device/Vendor/MSFT/Policy/Config/Defender/CloudExtendedTimeout 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: Configure extended cloud check
; State: Enabled
; Supported on: At least Windows Server 2016, Windows 10
[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows Defender\MpEngine]
"MpBafsExtendedTimeout"=dword:00000001
"MpBafsExtendedTimeout"=dword:00000000More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Configure extended cloud check
# State: Enabled
# Supported on: At least Windows Server 2016, Windows 10
$path = 'HKLM:\Software\Policies\Microsoft\Windows Defender\MpEngine'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'MpBafsExtendedTimeout' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'MpBafsExtendedTimeout' -Value 0 -Type DWordIntune XML
OMA-URI: ./Device/Vendor/MSFT/Policy/Config/Defender/CloudExtendedTimeout
Data type: String
Value:
<enabled/>
<data id="MpBafsExtendedTimeout" value="0"/>Intune Remediation
# === Detection script ===
# Exported from gporais.com
# Policy: Configure extended cloud check
# State: Enabled
# Supported on: At least Windows Server 2016, Windows 10
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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Windows Defender\MpEngine' -Name 'MpBafsExtendedTimeout' -Expected 1 -Kind DWord)
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Windows Defender\MpEngine' -Name 'MpBafsExtendedTimeout' -Expected 0 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Configure extended cloud check
# State: Enabled
# Supported on: At least Windows Server 2016, Windows 10
$path = 'HKLM:\Software\Policies\Microsoft\Windows Defender\MpEngine'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'MpBafsExtendedTimeout' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'MpBafsExtendedTimeout' -Value 0 -Type DWordSCCM scripts
# Exported from gporais.com
# Policy: Configure extended cloud check
# State: Enabled
# Supported on: At least Windows Server 2016, Windows 10
# 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: Configure extended cloud check
# State: Enabled
# Supported on: At least Windows Server 2016, Windows 10
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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Windows Defender\MpEngine' -Name 'MpBafsExtendedTimeout' -Expected 1 -Kind DWord)
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Windows Defender\MpEngine' -Name 'MpBafsExtendedTimeout' -Expected 0 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Configure extended cloud check
# State: Enabled
# Supported on: At least Windows Server 2016, Windows 10
$path = 'HKLM:\Software\Policies\Microsoft\Windows Defender\MpEngine'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'MpBafsExtendedTimeout' -Value 1 -Type DWord
Set-ItemProperty -Path $path -Name 'MpBafsExtendedTimeout' -Value 0 -Type DWordBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.