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Outlook must be configured to not run scripts in forms in which the script and the layout are contained within the message.


Overview

Finding ID Version Rule ID IA Controls Severity
V-223364 O365-OU-000019 SV-223364r508019_rule Medium
Description
This policy setting controls whether scripts can run in Outlook forms in which the script and layout are contained within the message. If you enable this policy setting, scripts can run in one-off Outlook forms. If you disable or do not configure this policy setting, Outlook does not run scripts in forms in which the script and the layout are contained within the message. Important: This policy setting only applies if the "Outlook Security Mode" policy setting under "Microsoft Outlook 2016\Security\Security Form Settings" is configured to "Use Outlook Security Group Policy".
STIG Date
Microsoft Office 365 ProPlus Security Technical Implementation Guide 2022-06-17

Details

Check Text ( C-25037r442311_chk )
Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Outlook 2016 >> Security >> Security Form Settings >> Custom Form Security "Allow scripts in one-off Outlook forms" is set to "Disabled".

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

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

If the value EnableOneOffFormScripts is REG_DWORD = 0, this is not a finding.
Fix Text (F-25025r442312_fix)
Set the policy value for User Configuration >> Administrative Templates >> Microsoft Outlook 2016 >> Security >> Security Form Settings >> Custom Form Security "Allow scripts in one-off Outlook forms" to "Disabled".