I've recently started receiving automatic replies to meeting invitations sent to company employees who are out of the office. The reply shows "Automatic reply: Meeting Forward Notification: ..." in the subject line, and "Microsoft Outlook" in the To: field. This behavior only started recently, and I don't see a pattern yet. I'm not a delegate for these people as far as I know. Is that what I need to look into? Are there any other explanations?