(44) Microsoft Outlook Add-In: This application add-in has been disabled

As part of a current project I am working on for MMD (Microsoft Managed Desktop) and Essential 8 deployed, one of the current policies which disables all Macros for Office 365 Suite App as per https://www.cyber.gov.au/acsc/view-all-content/publications/microsoft-office-macro-security

Users were getting this prompt on Outlook, users can simply select "Trust all documents from this publisher" or "Enable application add-in". To automate this process, look at the solution below.

Solution:

1. Navigate to https://endpoint.microsoft.com/ then select Devices then select By Platform: Windows then then select Configuration Profiles the profile that has disables all Macros within the Office Suite, in this case: All Macros Disabled.

2. Update the changes for Apply macro security settings to macros, add-ins and additional actions (User) set as Disabled.

3. Save the relevant changes.

4. Navigate to https://endpoint.microsoft.com/ then select Devices then select By Platform: Windows then then select Configuration Profiles. Select Create a profile then select Profile Type as Setting Catalog.

5. In the search field, type in: List of managed add-ins (User).

Select Enabled against List of managed add-ins (User).

To ensure we got the correct number of add-ins, navigate to HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Addins

Under the profile, enter the key names into Setting Catalog profile like so.

Save the changes and create the profile. Once this has been deployed successfully, there will be not more prompts.