Configure extended cloud check: registry value MpBafsExtendedTimeoutComputerHKLM\Software\Policies\Microsoft\Windows Defender\MpEngine

Policy ID: MpEngine_MpBafsExtendedTimeout
Scope: Computer Configuration
Supported on: At least Windows Server 2016, Windows 10
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: Windows Components › Microsoft Defender Antivirus › MpEngine

Registry

MpBafsExtendedTimeout

-Computer

HKLM\Software\Policies\Microsoft\Windows Defender\MpEngine Current key

MpBafsExtendedTimeout

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows Defender\MpEngine Current key

Enabled value: Depends on the option value
Element: Specify the extended cloud check time in seconds
Value type: REG_DWORD
Minimum value: 0
Maximum value: 50

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows Defender\MpEngine]

; Value names and types follow the ADMX. Replace <enter value> below with your own data
"MpBafsExtendedTimeout"=dword:<enter value>

CMD

:: Value names and types follow the ADMX. Replace <enter value> below with your own data

reg add "HKLM\Software\Policies\Microsoft\Windows Defender\MpEngine" /v "MpBafsExtendedTimeout" /t REG_DWORD /d "<enter value>" /f

PowerShell

# Value names and types follow the ADMX. Replace <enter value> below with your own data

New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows Defender\MpEngine' -Force | Out-Null
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows Defender\MpEngine' -Name 'MpBafsExtendedTimeout' -PropertyType DWord -Value '<enter value>' -Force | Out-Null