Aside from the Apex One server, Security Agents can update from custom update sources. Custom update sources help reduce Security Agent update traffic directed to the Apex One server and allow Security Agents that cannot connect to the Apex One server to get timely updates. Specify the custom update sources on the Customized Update Source List, which can accommodate up to 1024 update sources.
Tip:
Trend Micro recommends assigning some Security Agents as Update Agents and then adding them to the list.