Office 2019 is only available in click-to-run versions, no longer in MSI version.

1. Download the latest version of the Office Deployment Tool.
2. Extract the executable to the current directory:

   officedeploymenttool_12827-20268.exe /extract:.

3. Open the Office Customization Tool website.
4. Configure the Office deployment settings per requirements.
5. Export and save the generated XML file.
6. Start the installation with:

   setup.exe /configure yourxmlfile.xml

The website offers limited choices for Office (sub)programs.
To create an XML for only Outlook 2019:

1. Set Office-suite to Office Standard 2019 volumelicense.
2. Use the Outlook 2019 volume license MAK key as key.
3. After export of the XML open the XML and change:

   <Product ID="Standard2019Volume"

4. To:

   <Product ID="Outlook2019Volume"

See List of Product IDs which are supported by the Office Deployment Tool for Click-to-Run for the other Product IDs.