SBS 2008 Remote Outlook Web Access issues

Aelara used Ask the Experts™
Hello, I have setup a new SBS 2008 box. Everything works a treat on the internal lan as well as resources available to users via a vpn connection. Outlook web access, Remote workspace & Sharepoint resources as well as the default website all accessible without issues. The problem lies on the same resources made available to external users. I can get to the default web site via a port forward, example and I get to the IIS holding page. When I attempt to access Outlook via the web browser using the url changes to and I get a browser message along the lines of

"Safari can’t open the page “” because Safari can’t find the server “”"

Do I need to register a subdomain with my ISP and point it to the IP address of my router as i did with or can I make a change through IIS? All necessary ports including 25, 80,443,937 are open and forward to the server.

Any help would be greatly apreciated.
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Exaclty, you have to create a DNS A Record which points to your IP. Nothing else will work, because "The Internet" needs a way to know that is where it is. Do it, and it will work like a charm!

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