Replies or forwards to signed/encrypted messages must be signed/encrypted.

From Microsoft Outlook 2013 STIG

Part of DTOO317 - Signed/encrypted messages

SV-54065r1_rule Replies or forwards to signed/encrypted messages must be signed/encrypted.

Vulnerability discussion

This setting controls whether replies and forwards to signed/encrypted mail should also be signed/encrypted.

Check content

Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2013 -> Security -> Cryptography "Replies or forwards to signed/encrypted messages are signed/encrypted" is set to "Enabled". Procedure: Use the Windows Registry Editor to navigate to the following key: HKCU\Software\Policies\Microsoft\Office\15.0\outlook\security Criteria: If the value NoCheckOnSessionSecurity is REG_DWORD = 1, this is not a finding.

Fix text

Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2013 -> Security -> Cryptography "Replies or forwards to signed/encrypted messages are signed/encrypted" to "Enabled".

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