EXPERT RESPONSE
Outlook Web Access is set up by default when you install Exchange Server 2003. You can verify that it is present by going into the Internet Information Services (IIS) Manager and noticing the presence of the ExchWeb, Exchange and Public virtual directories under the Default Web Site.
You can check its functionality by opening http://<ServerName>/exchange in a Web browser. (Also try the secure connection by replacing HTTP with HTTPS in the URL.)
If you want to access OWA from the Internet, you need to use an IP address or a fully qualified domain name (FQDN), such as mail.yourdomain.com, instead of the NetBIOS server name in the URL. And if you have a firewall (which we hope you do), make sure to open inbound ports 80 (HTTP) or 443 (SSL) with proper translation to the internal address of your Exchange server.
Do you have comments on this Ask the Expert Q&A? Let us know.
Related information from SearchExchange.com:
Tip: Recreating IIS virtual directories for OWA in Exchange 2003
FAQ: Outlook Web Access issues
Learning Center: Troubleshooting Outlook Web Access
Learning Guide: Outlook Web Access administration
Reference Center: OWA tips and resources
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