Meeting invite changes and cancelations get stuck in queue


When sending meeting changes or cancelations to another mail server outside of your exchange 2003 organization messages get stuck in the queue and you Get the following errors:

Event Type: Warning
Event Source: MSExchangeTransport
Event Category: Exchange Store Driver
Event ID: 327

If an administrator tries to open the message in the Exchange System Manager console, the administrator may receive the following error message:Unable to open for delivery

To verify this is the issue follow these steps on the message that is stuck.

  1. Launch MFCMAPI and select OK.
  2. Choose Session –> Logon –> Display Store Table
  3. Select the proflle used to open the mailbox
  4. In the returned items look for the row that has "Mailbox – <username>" and double click to open the row
  5. In the new "Mailbox – <username>" window expand the Root – Mailbox folder
  6. Expand the IPM_SUBTREE (or the mailbox) folder
  7. Open the calendar folder by double clicking on it.
  8. In the new "Calendar" window navigate to the appointment item (you can sort by Subject by clicking the Subject column)
  9. Right click the appointment item and choose "Display Recipient Table" from the menu
  10. In the recipients table scroll to the right until you can view the column named "PR_RECIPIENT_TRACKSTATUS"
  11. Note the number value for each recipient and this will indicate their tracking status on the item.
  12. If the value is 0 then it means that the tracking status is not available.

In order to fix this issue apply this hot fix.
http://support.microsoft.com/kb/938650

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