O365-PT-000008 - Unsigned add-ins in PowerPoint must be blocked with no Trust Bar Notification to the user.

Information

This policy setting controls whether the specified Office application notifies users when unsigned application add-ins are loaded or silently disable such add-ins without notification. This policy setting only applies if the 'Require that application add-ins are signed by Trusted Publisher' policy setting is enabled, which prevents users from changing this policy setting.

If this policy setting is enabled, applications automatically disable unsigned add-ins without informing users.

If this policy setting is disabled, if this application is configured to require that all add-ins be signed by a trusted publisher, any unsigned add-ins the application loads will be disabled and the application will display the Trust Bar at the top of the active window. The Trust Bar contains a message that informs users about the unsigned add-in.

If this policy setting is not configured, the disable behavior applies, and in addition, users can configure this requirement themselves in the 'Add-ins' category of the Trust Center for the application.

Solution

Set the policy value for User Configuration >> Administrative Templates >> Microsoft PowerPoint 2016 >> PowerPoint Options >> Security >> Trust Center 'Disable Trust Bar Notification for unsigned application add-ins and block them' to 'Enabled'.

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_MS_Office_365_ProPlus_V3R1_STIG.zip

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-5(3), CAT|II, CCI|CCI-003992, Rule-ID|SV-223384r986154_rule, STIG-ID|O365-PT-000008, STIG-Legacy|SV-108943, STIG-Legacy|V-99839, Vuln-ID|V-223384

Plugin: Windows

Control ID: 4a08b890d16afa450b8db10efefd9c6c8a2c9ddb62b88a6ea1861061e2424ef3