We have a user, where it doesn't matter who sends it, but if you send her a meeting invite through outlook (exchange 2007), you get a non-deliverable message back from another user. Same one all the time though.
I checked her shared calendar properties and removed the user from the list.
I checked and made sure she wasn't using cache mode.
I checked the manage full permissions and send permissions within exchange and the user is not listed.
What am I missing?
Notes: Using Outlook 2007 with Exchange 2007 on a XP box and Server 2008.