We have a new Exchange 2007 server running on Server 2003 R2 X64 SP2. The server is configured with a SAN cert. OWA works fine. An Outlook 2007 client configured to connect via HTTP works fine both internally and externally--no problems at all.
Went to setup a couple of older Outlook 2003 clients and had trouble. It is configured to connect via RPC over HTTP, it works internally, but externally yields the following error:
"The connection to Microsoft Exchange Server is unavailable. Outlook must be online or connected to complete this action"
Looking for any insight.