Meeting/calendar notices sent from outside user are coming across as an email
item in my in-box, not as a calendar item.  Sender is NOT using "send as
I-calendar format" (which is something their administrator must change but
wont - don't go there please!).  

I upgraded from Office XP to Office 2003 thinking that would resolve the
problem because it wasn't a problem for an associate of mine.  It did not.

My associate using the same version of Outlook (XP 2003) gets the same
meeting notice and comes across as a meeting type (can accept, reject, etc.)
onto their calendar.  Works fine when I send one to myself.

Example of one of the message headers for one of these calendar meetings:

X-MimeOLE: Produced By Microsoft Exchange V6.5
Content-class: urn:content-classes:calendarmessage
MIME-Version: 1.0
Content-Type: multipart/mixed;

Is this a setting or something that can be caused via my ISP or ?

Thanks in advance!  Will