Documentation for Crowd 2.2. Documentation for other versions of Crowd is available too.
Crowd is a middleware application that connects web applications (such as CrowdID, JIRA and Confluence) to specified directories (e.g. Microsoft Active Directory, OpenLDAP). For details please see Concepts in the Crowd Administration Guide.
This means that:
CrowdID is automatically installed when you install Crowd. When you start Crowd for the first time and run the Setup Wizard, you will be offered the option of configuring CrowdID. If you choose not to setup CrowdID at that time, you can always set it up later as described in 4. Configuring CrowdID system settings. Note that you will also need to define the CrowdID application in Crowd, and map it to an appropriate directory — for details please see the Crowd Administration Guide.
To access CrowdID, go to http://localhost:8095/openidserver.