Information
This policy setting controls whether Outlook also applies the macro security settings to installed COM add-ins and additional actions.
The recommended state for this setting is: Enabled.
Rationale:
Attackers can insert malicious code into add-ins and smart tags in an attempt to affect your computing environment. By default, COM add-ins and smart tags are not subject to the same security restrictions as installed macros.
Impact:
Add-ins and smart tags will run under greater security restrictions. This configuration might have an impact on users that use add-ins and smart tags.
Solution
To establish the recommended configuration via GP, set the following UI path to Enabled:
User Configuration\Administrative Templates\Microsoft Outlook 2016\Security\Trust Center\Apply macro security settings to macros, add-ins and additional actions
Default Value:
Disabled. (Outlook does not use the macro security settings to determine whether to run macros, installed COM add-ins, and additional actions.)