Deep Security documentation is available at https://help.deepsecurity.trendmicro.com/.
Use the version selector at the top of the Help Center page to display help for the latest releases.
Other versions are available at https://help.deepsecurity.trendmicro.com/earlier-versions.html
Deep Security as a Service is now Trend Micro Cloud One - Workload Security. The help for that product is available at https://cloudone.trendmicro.com/docs/workload-security/.