I have 4 different email accounts set up with outlook. One of them is
an Exchange account. One of my POP accounts is already setup as my
default and all regular email works good.

The problem is, whenever I send a meeting request, Outlook sends the
email using the identity of my Exchange account, regardless of which
"Account" is specified in the Accounts pulldown. If I specify one of my
pop accounts in the meeting request, it only uses that smtp server as
the sender, then the recipient gets an email from exchange identity,
and the reply is also as such.

How can I set the identity of all my meeting requests to be sent from
my POP mail identity, and not the exchange identity?

Thanks everyone!