STIGQter: STIG Summary: Microsoft Outlook 2016 Security Technical Implementation Guide Version: 2 Release: 1 Benchmark Date: 23 Oct 2020:

Automatic sending s/Mime receipt requests must be disallowed.

DISA Rule

SV-228456r508021_rule

Vulnerability Number

V-228456

Group Title

SRG-APP-000516

Rule Version

DTOO266

Severity

CAT II

CCI(s)

• CCI-000366 - The organization implements the security configuration settings.

Weight

10

Fix Recommendation

Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Security -> Cryptography "S/MIME receipt requests behavior" to "Enabled (Never send S\MIME receipts)".

Check Contents

Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Security -> Cryptography "S/MIME receipt requests behavior" is set to "Enabled (Never send S\MIME receipts)".

Procedure: Use the Windows Registry Editor to navigate to the following key:

HKCU\Software\Policies\Microsoft\Office\16.0\outlook\security

Criteria: If the value RespondToReceiptRequests is REG_DWORD = 2, this is not a finding.

Vulnerability Number

V-228456

Documentable

False

Rule Version

DTOO266

Severity Override Guidance

Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Security -> Cryptography "S/MIME receipt requests behavior" is set to "Enabled (Never send S\MIME receipts)".

Procedure: Use the Windows Registry Editor to navigate to the following key:

HKCU\Software\Policies\Microsoft\Office\16.0\outlook\security

Criteria: If the value RespondToReceiptRequests is REG_DWORD = 2, this is not a finding.

Check Content Reference

M

Target Key

4224

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