You install the Session Recording Agent on each Server OS machine for which you want to record sessions. Within each agent is a setting that enables recording for the server on which it is installed. After recording is enabled, Session Recording evaluates the active recording policy, which determines which sessions are recorded.
When you install the Session Recording Agent, recording is enabled. Citrix recommends that you disable Session Recording on servers that are not recorded because they experience a small impact on performance, even if no recording takes place.