I have a co-worker who has reported that she can't receive meeting
request responses. I've sent her a test one and the exchange server
reports successful delivery, but still she doesn't see the response in
her inbox, or calendar or anything. She still receives normal e-mails
without anything obviously weird.

I've looked through her settings and nothing leaped out at me as
saying "click this button to ignore all meeting request responses",
she doesn't have any obviously stupid filtering rules, and the meeting
request responses aren't ending up in her "Junk Mail" folder, so I
don't think it's the spam-filtering software we have here, either.

She's running Windws XP and just the standard Office 10 (XP) version
of Outlook.

If anyone can suggest a possible cause that I haven't already tried,
that'd be great!

Cheers & God bless
   Sam Penny