I have ran across an issue I have never seen before. We use outlook with exchange. This morning, a user set up a test meeting for me, her and her boss in her boss' calendar. I accepted the meeting, and looked at the acceptance email that was sent to her from my sent mail folder. It sent it only to her, as it should. However, when she views the incoming email message from me (my acceptance email) it shows that the acceptance email was actually sent to multiple people and not just her.