We have been running Exchange 2003 with Outlook 2002 (XP) clients since 2005. Until now we have had little or no problem with double-booking resources.
We recently upgraded the clients to Outlook 2007. We find that users can now double-book resources if they:
Show the resource calendar by checking the box next to the resource (CR1) under People's Calendars
Hide their own calendar by un-checking Calendar under My Calendars
Right-click on the calendar and pick New Appointment
If the Scheduling tab is clicked, it will show the resource (CR1) listed as the meeting organizer
Because of this, the resource can be double booked.
Settings for the resource's calendar are:
Automatically accept meeting requests and process cancellations, and
Automatically decline conflicting meeting requests.
Permissions are set to:
default - Author
Anonymous - None
Thanks in advance for your help!