A generic user can be used for specific limited security access, or it can be used in more advanced environments where a generic user can be used to signon to a host and then a command on the host can be used to "connect" to the actual user. On the AS400 this can be accomplished with a job connection but requires advanced AS400 programming skills and systems knowledge to implement.
Either a simple text UserID that will be used to logon all users or * to indicate one passed as a connection parameter. Before any generic user can be used, it needs to be connected to passing the value "HostPW" so that a credentials file can be created for the generic user.
See the MsgParentTester sample HTML file for an example that will test the Generic User while enabling setting the password.