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I won’t forget how I resolved this one coz I had to spent some quality time and do extensive homework!

Following are some of the troubleshooting steps you may attempt in the event you face an issue as mentioned in the title.

Issue:

Exchange 2010 Meeting Room mailbox is not accepting the meetings for some users

 

Cause:

Change in attribute from outlook to Exchange CAS server.

Troubleshooting:

1. Verified the meeting room configuration.
   
2. Created new meeting room.
   
3. Sent from different users.
   
4. Run the cmdlet and got the following results.
   Get-mailbox <Identity>| fl *type*,*link*,*share*

   The output was the following:
   

   ResourceType                 : Room
   RecipientType                 : UserMailbox
   RecipientTypeDetails        : RoomMailbox
   IsLinked                          : False
   LinkedMasterAccount       : NT AUTHORITYSELF
   IsShared                         : False

   Get-CalendarProcessing <Identity> | fl AutomateProcessing

   The output was the following:
   

   AutomateProcessing      AutoAccept.

   Get-Calendarprocessing <Identity> | fl *policy

   The output was the following:
   

   RequestOutOfPolicy            :
   AllRequestOutOfPolicy         : False
   BookInPolicy                      :
   AllBookInPolicy                   : True
   RequestInPolicy                  :
   AllRequestInPolicy              : False
   

5. Checked for the same user from OWA. It was working but this was not the expectation and customer told me that Add-ins/API are same between 2 computer where one has working user and other has non-working user.
   
6. Tried outlook /resetfolders
   
7. Restarted the Microsoft Exchange Mailbox Assistants.
   
8. Increase the diagnostic logging on MSExchangeMailboxAssistant> Approval assistant and Resource booking attendant to Expert.
   
9. Started the Extrace from Exchange 2010 EMC tools for following
   
   1. MailboxAssistants.Assistants
      
   2. MailboxAssistants.Assistants.Approval
      
   3. MailboxAssistants.Assistants.Calendar
      
   4. MailboxAssistants.Assistants.CalendarNotification
      
   5. MailboxAssistants.Assistants.CalendarRepair
      
   6. MailboxAssistants.Assistants.CalendarSync
      
   7. MailboxAssistants.Assistants.ResourceBooking
      
   8. Infoworker.Common
      
   9. Infoworker.Availability
      
   10. Infoworker.MeetingValidator
       
10. Sent a meeting request to the Room mailbox from a problem mailbox.
    
11. Stopped the Extrace and analyzed
    
12. Found the below error in the Extrace
    

    MReq SentRepresenting and CalItem SentRepresenting do NOT match.
    

13. Now it was sure that some attributes are getting changed in outlook so the suspect was Add-Ins.
    
14. Took the remote control of the problem machine and found the below screenshot.
    

                    15. So the ST in the middle told us that there is something in the middle. The normal meeting windows looks like the window below

                   16. We checked the Add-ins and found IBM Same Time add-in was there.

                   17. We disabled the add-in still no luck.

                   18. We removed this add-in and auto accept started working in the meeting room mailbox.

Resolution:

Extrace will show the issue: MReq SentRepresenting and CalItem SentRepresenting do NOT match.

In this case IBM SameTime Add-in caused the issue and removing the add-in fixed the issue.

Conclusion:

If you see the issue where auto accept is working from OWA and not working from Outlook then it is an outlook add-in issue.

You will also find something before meeting as marked in the screenshot then we need to check the add-in and remove it.

Prabhat Nigam (Wizkid)
Team@MSExchangeGuru

Keywords: Exchange 2010 room mailbox unable to process requests, exchange 2010 room mailbox not working, Exchange 2010 room mailbox issue, room mailbox not accepting meeting requests

Posted October 29th, 2012 under Exchange 2010, Exchange Tools, Outlook. RSS 2.0 feed. Leave a response, or trackback.