Outlook users that work with Exchange servers may have problems sending meeting requests to your users working with the CommuniGate Pro MAPI Connector. Meeting requests sent via an Exchange server may come in as plain text messages instead. The Exchange users should adjust the configuration of their Outlook applications:
Using Outlook Tools menu, Exchange users should open the Options dialog box. After they click the Calendaring Options button, the dialog box appears and they should enable the Send meeting requests using iCalendar by default option.