I do not know how to create Client Session in OpenFire, and everything I saw on Google didn’t seem right and to be completely honest was a little lost reading them. I know a okay amount of OpenFire. I’ve just never had to create a Client Session before for someone.
A client session will be created when a user connects to Openfire using an XMPP-based chat client (like Spark, Pade, or one of the many third party clients that are available). Is that what you are trying to do?