If the tokens mentioned above only resave the message, then I am not aware of any way to make this happen. It sounds like you only see the dialog the first (and only the first) time the message is saved (i.e. added to the message store).
You may wish to ask this question in one of the Novell DeveloperNet forums, as this is GroupWise API/Client feature question. Those forums are monitored by Novell engineers who may have other suggestions for you.