I have my Windows 2003 SBS setup to allow clients to access OWA and they access the Exchange data from Outlook 2003 while they're in the office. I want the client to be able to access the Exchange data when they're outside of the office also but I don't want to setup a VPN. I have seen Exchange setup to allow clients to "Connect to Microsoft Exchange using HTTP". I see in Outlook that connection settings for Exchange can be set to "Use this URL to connect to my proxy server for Exchange".
My question is two-part.
1. What are the steps I need to take to make my 2003 Exchange server configured to allow the clients to connect to it VIA HTTPS?
2. Is this method secure enough or should I spend the time and money for a VPN?
Thanks for your advice!