I am seeing this same behavior with Outlook 2003 client (pop3 and exchange
account). There is no problem when the default account is the exchange server
(though no emails will go out and that's a BIG problem. Set the pop3 back to
the default and now email goes out to pop3 but when I send a meeting to a
recipient who also has an account on the exchange server, the meeting request
goes into the pop email inbox and subsequent acceptance places the new event
in the users personal calendar as opposed to in the shared exchange calendar.
The user must then drag the meeting over to the correct calendar and that is
a bit of a drag... I am considering writing some kind of script or outlook
extension to get around this.

"Jeff B" wrote:

I am running Outlook 2002 and 2003, SBS 2000 SP4 w/ Exchange 2000 SP3.
Outlook clients have two mail accounts; Exchange for sharing calendars and
contacts, and POP3 (ISP Hosted) for incomming and outgoing mail.

In Outlook 2002, meeting messages are sent successfully using the POP
account and user.

In Outlook 2003, the meeting message is sent from (pop user) on behalf of
(Exchange user) which the ISP denies access to their SMTP server as an
unauthorized user. Note: switching accounts in the FROM field has no affect
on this phenomena. Sending from the Exhange account tries to send using
Exchange Server and fails. Sending from the POP account produces above
reported results.

This may be a settings problem.

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