You use a client computer or a server to migrate mailboxes from a Microsoft Exchange Server 2003 environment to an Exchange Server 2007 Service Pack 1 (SP1) environment.
You import the .pst data that is created by the Exchange Server Mailbox Merge Wizard (ExMerge) into the Exchange 2007 mailboxes onto a computer that has the following programs installed:
Microsoft Office Outlook 2007
In this scenario, after you migrate the mailboxes, the Free/Busy information for some users seems to be corrupted. When a user accesses their Free/Busy information, the Outlook Web Access service stops on the computer that is running Exchange 2007.
The events logged in the Application log on the server that is running Exchange 2007 are provided in the "More Information" section.
How to obtain the hotfix
This issue is fixed in the Outlook 2007 post-Service Pack 1 hotfix package that is dated September 24, 2008. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
957909 Description of the Outlook 2007 post-Service Pack 1 hotfix package: September 24, 2008
Important You do not have to apply this hotfix if you do not run Outlook 2007 in the scenario that is described in the "Problem description" section.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows
Exit Outlook 2007.
Start Registry Editor.
In Windows Vista, click Start, type regedit in the Start Search box, and then press ENTER.
If you are prompted for an administrator password or for confirmation, type the password, or provide confirmation.
In Windows XP, click Start, click Run, type regedit in the Open box, and then click OK.
Locate and then click to select the following registry subkey:
Check whether the problem is fixed. If the problem is fixed, you are finished with this article. If the problem is not fixed, you can contact support.
The following events are logged in the Application log on the server that is running Exchange 2007:
Event Type: Error Event Source: MSExchange Common Event Category: General Event ID: 4999 Date: date Time: time User: N/A Computer: computer_name Description: Watson report about to be sent to dw20.exe for process id: 5500, with parameters: E12IIS, c-RTL-AMD64, 08.01.0240.006, OWA, M.E.D.Storage, M.E.D.S.Folder.InternalBind[T], System.ArgumentException, 6e81, 08.01.0240.005. ErrorReportingEnabled: False
Event Type: Warning Event Source: W3SVC Event Category: None Event ID: 1011 Date: date Time: time User: N/A Computer: computer_name Description: A process serving application pool 'MSExchangeOWAAppPool' suffered a fatal communication error with the World Wide Web Publishing Service. The process id was '5500'. The data field contains the error number. Data: ?: 6d 00 07 80 m..€
Event Type: Error Event Source: W3SVC Event Category: None Event ID: 1002 Date: date Time: time User: N/A Computer: computer_name Description: Application pool 'MSExchangeOWAAppPool' is being automatically disabled due to a series of failures in the process(es) serving that application pool.
Note The events are logged in the Application log because Internet Information Services (IIS) automatically starts a new instance of the W3wp.exe process to host the Exchange 2007 Outlook Web Access service.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
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