I'd like to delegate authentication to another IdP (which is not the Horizon Workspace IdP). I've added my IdP as an Identity Provider in Identity Manager, but I'm not sure what to do next. I'm looking for some documentation with examples of how to do this. My IdP currently allows users to use their AD credentials to login to various externally hosted resources. The goal is to have links to these externally hosted resources in Identity Manager that do not require users to login when launched.