Harjit-MSFT
Hi,
The first bit of information is correct. Initially, in Outlook 2003, when we enter our server information it¡¯s requesting the actual mailbox server name. This could be the NETBIOS or FQDN of the ¡°back end¡¯ mailbox server (ex. mbserver.contoso.com). After clicking ¡°More Settings > Connection tab¡±, under ¡°Exchange over the Internet¡± check the ¡°Connect to my Exchange mailbox using HTTP¡± check box. Then click ¡°Exchange Proxy Settings¡¡± This is where you enter the RPC Proxy server which is usually the ¡°front end¡± server¡¯s external FQDN (ex. mail.contoso.com).
All this information is available in the white papers. The links of the white papers were posted by me in the past.
As per the second question. This is totally untrue. The white paper, explains how RPC over HTTP works. Essentially Outlook connects to the ¡°front end¡± server, which is where a lot of users get OWA anyway (that could be where the confusion lies). This ¡°front end¡± server PROXIES the Outlook RPC requests directly to the mailbox server that houses that particular user¡¯s mailbox.
The data stream looks somewhat like this:
For Outlook RPC over HTTP:
Outlook client <-HTTPS protocol-> front end mailbox server (RPC proxy server) <-RPC protocol-> back end mailbox
For OWA:
IE browser <-HTTPS protocol-> front end mailbox server (OWA server) <-HTTP protocol-> back end mailbox server
Please let me know if you have any questions.
Thanks,
Harjit.