'Contol Panel|Mail|Show Profiles|Add', create a new profile and do NOT add
the Exchange Server service to it. After you have the new profile setup and
tested, you can delete the old one.
http://support.microsoft.com/kb/829918/en-us
How to create a new e-mail profile in Outlook 2007 and in Outlook 2003
Hal

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Hal Hostetler, CPBE -- hhh@kvoa.com
Senior Engineer/MIS -- MS MVP-Print/Imaging -- WA7BGX
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> I am trying to change an outlook account in Outlook 2003 from an ISP to a
> qwest account (MSN). I am receiving email but unable to send mail. I get a
> message that says "connection to Microsoft Exchange Server is unabailable.