Configure extended cloud check

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

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.

Options

  • Specify the extended cloud check time in seconds

Registry

ComputerHKEY_LOCAL_MACHINE
  • MpBafsExtendedTimeout-
  • MpBafsExtendedTimeoutREG_DWORD

Other policies in the same category

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