If you have OL2000, you can't use Internet Mail and Exchange in the
same profile - it isn't supported.
Either use a different profile for your Internet mail, or use OE for
same, or upgrade to OL2003 which can handle both types of accounts
in one profile - or if this is mail on your company domain, talk to
the Exchange admin about having the Exchange server handle all mail.
If you don't have an Internet mail account in your profile, all your
mail is
handled by your Exchange server and you can't change how it's
handled on the
server side from Outlook. What kinds of problems are you having with
it, and
have you talked to your Exchange admin?