Have you assigned configuration objects to these users in eDirectory? Failure to do this is often the reason why applets to do appear. Another reason may be related to the registration status of Runtime.
Could you please email me the configuration information from one of the client machines where no applets are visible? From the GroupWise main menu select Help | About Formativ. When the about box appears select the configuration tab. Press the ‘copy to clipboard’ button, then paste into an email message addressed to email@example.com.