All component updates originate from the Trend Micro ActiveUpdate server. When updates are available, the OfficeScan server and smart protection sources (Smart Protection Server or Smart Protection Network) download the updated components. There are no component download overlaps between the OfficeScan server and smart protection sources because each one downloads a specific set of components.
You can configure both the OfficeScan server and Smart Protection Server to update from a source other than the Trend Micro ActiveUpdate server. To do this, you need to set up a custom update source. If you need assistance setting up this update source, contact your support provider.