Hello Everyone, I'm used to the typical scenario where VPN is required to access Outlook/Exchange. I'm going to be setting up my first Exchange 2003 server that will allow RPC over HTTPS Outlook clients. ISA will be the firewall. I'm sure this is pretty standard these days but I'm a little nervous about having Exchange facing the internet without the protection of VPN. Has everyone had pretty good luck with this scenario? Have you found that Outlook is able to sync up over more connections without the needed VPN?

This is basically rpc over HTTPS which is similar to accessing OWA over SSL. The thing that is nice about Outlook Anywhere is that you can literally get to it from anywhere there is an internet connection. I look at it like this, if you allow your users to get to OWA from a Kiosk in a mall then why not allow them to get to Outlook Anywhere using their laptop from a starbucks etc.This also will remove the need for a VPN.SF - MCITP:EMA, MCTS

John, attached is the article which will help you to setup your single exchange with rpc-over-http http://www.msexchange.org/tutorials/Implementing-RPC-over-HTTPS-single-Exchange-Server-2003-environment.html Benefits of Using RPC over HTTP There are several benefits to using RPC over HTTP to enable Microsoft Office Outlook 2003 clients to access Microsoft Exchange Server, instead of using a virtual private network (VPN). The benefits are the following: * You can use the same URL and namespace that you use for Microsoft Office Outlook Web Access for Exchange Server 2003, Exchange ActiveSync, and Microsoft Outlook Mobile Access. * You can use the same Secure Sockets Layer (SSL) server certificate that you use for Outlook Web Access, Exchange ActiveSync, and Outlook Mobile Access. * No unauthenticated requests from Outlook can access Exchange servers. * Clients must trust server certificates, and certificates must be valid. You must allow only port 443 through your firewall, because Outlook requests use HTTP over SSL. If you already use Outlook Web Access with SSL, Exchange ActiveSync with SSL, or Outlook Mobile Access with SSL, you do not have to open any additional ports from the Internet. Vinod |CCNA|MCSE 2003 +Messaging|MCTS|ITIL V3|