The ISessionEngines interface is used in cluster configurations to register and unregister session engines with the Web tier.

Each of the methods on the sessions engines interface requires a password. The password parameter is used to prevent unauthorized registration of session engines. If the password parameter is not specified correctly in a call to one of the registration methods, the web service does not return any response to the caller. The password is configured in the UNICOM Intelligence Interviewer Web configuration file, web.config.

The Web Tier logs all registration attempts. Successful attempts are logged at the Info log level, and failed attempts are logged at the Error log level.