RPC Over HTTPS Article. Amit Zinman, an author over at MSExchange.org has just published an article on RPC over HTTPS. Summary: Exchange 2003 allows Outlook to connect using HTTPS and still receive all of the messaging features. This has been a much requested feature since regular RPC/MAPI was sometimes very slow or just timed out on WAN connections. In this article we'll see how one goes about setting this up.