Users customizing attachment security settings must be prevented.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-17766	DTOO238 - Outlook	SV-33525r1_rule	ECSC-1	Medium

Description
All installed trusted COM addins can be trusted. Exchange Settings for the addins still override if present and this option is selected

STIG	Date
Microsoft Outlook 2010	2015-09-17

Details

Check Text ( C-34012r1_chk )
The policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2010 -> Security “Prevent users from customizing attachment security settings” must be set to “Enabled”. Procedure: Use the Windows Registry Editor to navigate to the following key: HKCU\Software\Policies\Microsoft\Office\14.0\outlook Criteria: If the value DisallowAttachmentCustomization is REG_DWORD = 1, this is not a finding.

Check Text ( C-34012r1_chk )

The policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2010 -> Security “Prevent users from customizing attachment security settings” must be set to “Enabled”.

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

HKCU\Software\Policies\Microsoft\Office\14.0\outlook

Criteria: If the value DisallowAttachmentCustomization is REG_DWORD = 1, this is not a finding.

Fix Text (F-29700r1_fix)
Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2010 -> Security “Prevent users from customizing attachment security settings” to “Enabled”.