Client Shutdown in MAPI (Outlook 2010 fast shutdown)

I am sharing this as couple of my customers were enquiring is there any changes or effects of Client Shutdown in MAPI (Outlook 2010 fast shutdown).  MAPI clients can shut down the same way as before, or if needed, they can use fast shutdown. In Outlook 2010, MAPI subsystem provides the IMAPIClientShutdown : IUnknown interface….