The CDC Servlet (/amserver/cdcservlet) is always available and enabled on the Access Manager server. There are no special steps to install and configure it. However, if you deploy multiple AM instances behind a load balancer, you need to configure the Access Manager instances accordingly. The configuration has nothing to do with CDSSO. For instructions on how to configure multiple Access Manager instances behind a load balancer, see "Deployment Example: Access Manager Load Balancing, Distributed Authentication, and Session Failover" at the following URL:
The policy agent part of the configuration will vary depending upon whether you are using a single Access Manager instance or multiple Access Manager instances.