We have a number of shared mailboxes which we use for meeting rooms and all are set to automatically accept/decline meeting requests. The problem is that they are accepting all the meetings as tentative and only declining or accepting as busy when the mailbox is manually logged on to; then the email confirmations are automatically sent. Until this happens rooms are being double-booked as Outlook continues to accept bookings while the currents ones are tentative. Obviously it isn't practical to keep logging on to the mailboxes all the time.