Resource mailbox meeting conflicts booked as tentative instead of declined

We recently created new room resource mailboxes to host our conference rooms at our new office location.

Currently when an organizer books a conflicting meeting, it gets marked as tentative on the resource mailbox calendar and the organizer receives a tentative e-mail. The desired behavior is to not use any delegate approval process and allow all users the ability to modify their own meetings. I'd like those conflicting meetings to either immediately notify the organizer when they attempt to send the meeting request that it won't be accepted and/or is declined, or to have the e-mail notifiction to say it was declined instead of tentative.

Below is a sample resource configuration. What am I doing wrong?

[PS] C:\Windows\system32>Get-CalendarProcessing -identity bitsbytes | fl
RunspaceId                          : 624dbd93-c0ee-410e-8bc3-dcb1d53d332a
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               : True
BookInPolicy                        : {}
AllBookInPolicy                     : True
RequestInPolicy                     : {}
AllRequestInPolicy                  : False
AddAdditionalResponse               : False
AdditionalResponse                  :
RemoveOldMeetingMessages            : True
AddNewRequestsTentatively           : False
ProcessExternalMeetingMessages      : False
RemoveForwardedMeetingNotifications : False
MailboxOwnerId                      : domain.com/Resources/Rooms/RoomName
Identity                            : domain.com/Resources/Rooms/RoomName
IsValid                             : True