I received a meeting request from another user of 2003 Outlook and when it
came through it was in plain text format. We are not using Exchange server
but I tried it with another person (also not using Exchange) that was only
using the pop account and we both were able to click the accept, decline and
so on buttons. Does anyone know why it would still be doing this?

Alicia Rittenhouse wrote:

I received a meeting request from another user of 2003 Outlook and
when it came through it was in plain text format.

Did that person send it in plain text or in Rich Text? If they sent it in
the latter format but you received it as plain text, have that person check
your Internet Mail settings in your contact record. Have him or her open
your contact record and double-click your email address. At the bottom of
the "E-mail Properties" dialogue you get should be an "Internet format"
drop-down that should be set to "Let Outlook decide the best sending
format".
--
Brian Tillman