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← Back to Microsoft Defender Antivirus Security Technical Implementation Guide

V-213451

CAT II (Medium)

Microsoft Defender AV must be configured to turn on email scanning.

Rule ID

SV-213451r1260219_rule

STIG

Microsoft Defender Antivirus Security Technical Implementation Guide

Version

V2R10

CCIs

CCI-001170

Discussion

This policy setting allows the configuration of email scanning. When email scanning is enabled, the engine will parse the mailbox and mail files according to their specific format in order to analyze the mail bodies and attachments. Several email formats are currently supported, for example: pst (Outlook), dbx mbx mime (Outlook Express), binhex (Mac). If this setting is enabled, email scanning will be enabled. If this setting is disabled or not configured, email scanning will be disabled.

Check Content

Verify the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Microsoft Defender Antivirus >> Scan >> "Turn on email scanning" is set to "Enabled".
  
Procedure: Use the Windows Registry Editor to navigate to the following key: 
HKLM\Software\Policies\Microsoft\Windows Defender\Scan

If the value "DisableEmailScanning" is "REG_DWORD = 0", this is not a finding.
If the value is "1", this is a finding.

Alternate Check (if Microsoft Intune applied this setting):

Navigate to "HKLM\Software\Policies\Microsoft\Windows Defender\Policy Manager".

If the value "AllowEmailScanning" is "REG_DWORD = 1", this is not a finding.
If the value is "0", this is a finding.

Fix Text

Set the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Microsoft Defender Antivirus >> Scan >> "Turn on email scanning" to "Enabled".