Hello, how can we get a pop-up or other type of alert to be displayed before a user sends a calendar invitation to prevent double-bookings? The resources are already setup to not allow conflicts, and the user creating the event will get an e-mail saying it's declined, but we want the user to get a pop-up or some other alert before they send the invitation so they can adjust it. Does this make sense? I've read some forums people go into Outlook and set the calendar - resource settings to auto-accept and decline conflicts. I have this set for some test resources, but it still doesn't prompt me before sending the invitation if a conflict exists. Below is the settings AutomateProcessing : AutoAccept AllowConflicts : False BookingWindowInDays : 180 MaximumDurationInMinutes : 1440 AllowRecurringMeetings : True EnforceSchedulingHorizon : True ScheduleOnlyDuringWorkHours : False ConflictPercentageAllowed : 0 MaximumConflictInstances : 0 ForwardRequestsToDelegates : True DeleteAttachments : True DeleteComments : True RemovePrivateProperty : True DeleteSubject : True DisableReminders : True AddOrganizerToSubject : True DeleteNonCalendarItems : True TentativePendingApproval : True EnableResponseDetails : True OrganizerInfo : True ResourceDelegates : {} RequestOutOfPolicy : AllRequestOutOfPolicy : False BookInPolicy : AllBookInPolicy : True RequestInPolicy : AllRequestInPolicy : False AddAdditionalResponse : False AdditionalResponse : RemoveOldMeetingMessages : True AddNewRequestsTentatively : True ProcessExternalMeetingMessages : False DefaultReminderTime : 15 RemoveForwardedMeetingNotifications : False Identity : domain/Users/Test-Room1

Hi, Resource Mailbox has the Scheduling Assistant feature, you can know whether the free time is avaiable when opening the meeting request. For more information, you can refer to the below thread: http://social.technet.microsoft.com/Forums/en-US/exchange2010/thread/1e5bb85a-6a2d-4fee-8490-fad263c96b52 Thanks Allen