You have an ICAP / Cloud Detection Server (CDS) for WSS detector and are wondering if it can be integrated with the Web Isolation (WI).
Web Isolation integration is only for detectors of type REST API, or the CDS for REST (aka a CASB/CloudSOC integration).
An ICAP / CDS for WSS detector and is not capable of integrating with Web Isolation.
We currently have no plans on the Roadmap to support ICAP / CDS for WSS detector and Web Isolation integration.