Greetings! We are using Exchange 2007 with SP3. We have a problem that users are able to make duplicate entries in calendar of one room, but the settings for conflict are set to FALSE. Here are room settings, can anyone help me to find out, why duplicates are allowed and how to fix this? [PS] C:\Documents and Settings\Desktop>Get-MailboxCalendarSettings ROOM-NAME | fl AutomateProcessing : AutoAccept AllowConflicts : False BookingWindowInDays : 1080 MaximumDurationInMinutes : 1440 AllowRecurringMeetings : True EnforceSchedulingHorizon : True ScheduleOnlyDuringWorkHours : False ConflictPercentageAllowed : 0 MaximumConflictInstances : 0 ForwardRequestsToDelegates : True DeleteAttachments : True DeleteComments : True RemovePrivateProperty : False DeleteSubject : False DisableReminders : True AddOrganizerToSubject : True DeleteNonCalendarItems : True TentativePendingApproval : False EnableResponseDetails : True OrganizerInfo : True ResourceDelegates : {} RequestOutOfPolicy : some persons AllRequestOutOfPolicy : False BookInPolicy : some persons AllBookInPolicy : False RequestInPolicy : AllRequestInPolicy : True AddAdditionalResponse : False AdditionalResponse : <DIV><FONT size=2 face=Tahoma></FONT></DIV> RemoveOldMeetingMessages : True AddNewRequestsTentatively : True ProcessExternalMeetingMessages : False DefaultReminderTime : 15 RemoveForwardedMeetingNotifications : False Identity : sth.localRooms & Resources/ROOM-NAMEbostjanc

Hello, From the "Get-MailboxCalendarSettings" information you provided, I noticed that many of the settings are customized. Here, I am providing you a standard settings of a resource mailbox: ================================================ RunspaceId : 5f4cd63c-a897-476b-8d83-75096ecfbf4e 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 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 RemoveForwardedMeetingNotifications : False MailboxOwnerId : vs216432.lab/Users/Room3 Identity : vs216432.lab/Users/Room3 IsValid : True ====================================================== Please refer to the following article to make the changes and see if the issue persists. http://technet.microsoft.com/en-us/library/aa996340(EXCHG.80).aspx Thanks, Simon