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Exchange 2007 SP1 resource getting double booked by adding it as a required attendee

Posted on 2008-10-14
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Last Modified: 2011-02-18
When a user creates a meeting in Outlook 2003 (Exchange 2007 SP1), they are adding a meeting room as a required attendee instead of a resource.  If that room was already properly booked as a resource and another user books the same meeting time but makes that room an attendee, the room will get technically get double booked.

I've tested this with Outlook 2003 clients and it will allow me to do it.  The same goes with Outlook 2007.  I even opened that calendar in OWA and it shows 2 meetings for the same time.
What is really neat is in OWA 2007, if I add a meeting room under the "Select Attendees"list, it comes back and says "Rooms are not allowed in the attendee list and have been moved to the rooms list." which is great!

Bsides educating the user community (which we know isn't always easy), is there a way to prevent a resource from getting booked as an attendee in Outlook?

My setup is the following:
Exchange 2007 SP1
CAS/HUB server
SCC mailbox cluster
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Question by:tweeter514
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jkarnes12 earned 500 total points
ID: 22716601
I would definitely educate your end users on how to book a room, but I would also run this cmdlet against your Resource mailboxes:

Set-MailboxCalendarSettings <roomaccountname> -Allowconflicts $false

This will prevent anyone from double booking a room.
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by:tweeter514
ID: 22720779
Yes - that was already run when the room was first set up.  AutomateProcessing:AutoAccept and AddNewRequestsTentatively $false were set too.
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Expert Comment

by:CountryMark2
ID: 34930166
Were using outlook 2k7 sp1 also and non of this matters.  i have set the conflicts to false and the resources were created in exchange 2k7 sp1 as a resource so they are not regular users, the are resources, and they are disabled users in AD.

it still doesn't pop-up and tell our users that the room has been booked BEFORE IT SENDS THE MESSAGE TO EVERY RECIPIENT IN THE MEETING REQUEST!!!

anyone figure this out?

and another question, how can we make it so that when a room is already booked, and the user hits the 'scheduling assistant', and they see its booked, how can you make it so that the user can see WHO has the room booked and when and why?
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