My question relates to the first parameter in the ExchangeClient() API. Why is mailBoxUri solicited?
My understanding of a mailBoxUri is that this is for Outlook Web Access (OWA). Is this your understanding? If yes - Does the ExchangeClient support a non OWA method of accessing an Exchange server (via an intranet/MAPI)? My understanding is also that not all IT departments put their Exchange servers on the web for web access. What can I do if a company does not support OWA?