Users customizing attachment security settings must be prevented.

From Microsoft Outlook 2013 STIG

Part of DTOO238 - Prev't users customizing security set

SV-53929r1_rule Users customizing attachment security settings must be prevented.

Vulnerability discussion

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

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Fix text

Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2013 -> Security "Prevent users from customizing attachment security settings" to "Enabled".

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