We have a user who receives appointments that are sent to a "XYZ-All" distribution list that hits all local office employees. When he accepts those appointments, all users on the distribution list get a notice that he has accepted, rather than just the sender.

We know he uses his Blackberry for accepting 75% of his appointments, but it feels like this happens no matter where he accepts so I think it's an account thing. Just to try to rule out the Blackberry we have re-pushed his service books to him hoping that would reset it but it made no difference.

Is there anything else I should be checking here?