Outlook Security Mode must be configured to use Group Policy settings.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-17760	DTOO239	SV-53934r1_rule		Medium

Description
If users can configure security themselves, they might choose levels of security that leave their computers vulnerable to attack. By default, Outlook users can configure security for themselves, and Outlook ignores any security-related settings that are configured in Group Policy.

STIG	Date
Microsoft Outlook 2013 STIG	2017-03-17

Details

Check Text ( C-47944r1_chk )
Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2013 -> Security -> Security Form Settings "Outlook Security Mode" is "Enabled (Use Outlook Security Group Policy)". 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 AdminSecurityMode is REG_DWORD = 3, this is not a finding.

Check Text ( C-47944r1_chk )

Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2013 -> Security -> Security Form Settings "Outlook Security Mode" is "Enabled (Use Outlook Security Group Policy)".

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 AdminSecurityMode is REG_DWORD = 3, this is not a finding.

Fix Text (F-46834r1_fix)
Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2010 -> Security -> Security Form Settings "Outlook Security Mode" to "Enabled (Use Outlook Security Group Policy)".