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How do I remove Managed Microsoft Defender "Host" level exclusions

Alan
  • Updated

 

Team: Huntress Managed Endpoint Detection and Response
Product: Managed Microsoft Defender
Environment: Windows OS
Summary:  Exclusions need to be removed from the Windows Security Center if "Source: Host" is set in Exclusions from Antivirus Policy Status to make the agent compliant.

 

Exclusions set directly on an individual computer cannot be cleared by the Huntress agent, so if you see a "Source: Host" exclusion making your agent non-compliant in the Managed Microsoft Defender portal, you'll need to manually remove them to become compliant again.

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Open up Windows Security Center (click on the start button and type "Windows Security Center")

Click on Virus & threat protection

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Click on Manage Settings

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Scroll down and click on Add or remove exclusions

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For each exclusion you wish to remove move your mouse over the exclusion until a down arrow appears,  click on that, then click the Remove button that appears

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Using PowerShell:

# set exclusions to default
$pathExclusions = Get-MpPreference | select ExclusionPath 
foreach ($exclusion in $pathExclusions) {
    if ($exclusion.ExclusionPath -ne $null) {
        Remove-MpPreference -ExclusionPath $exclusion.ExclusionPath
    }
}
$extensionExclusion = Get-MpPreference | select ExclusionExtension 
foreach ($exclusion in $extensionExclusion) {
    if ($exclusion.ExclusionExtension -ne $null) {
        Remove-MpPreference -ExclusionExtension $exclusion.ExclusionExtension
    }
}
$processExclusions = Get-MpPreference | select ExclusionProcess
foreach ($exclusion in $processExclusions) {
    if ($exclusion.ExclusionProcess -ne $null) {
        Remove-MpPreference -ExclusionProcess $exclusion.ExclusionProcess
    }
}

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