Microsoft KB Archive/159295

= XFOR: Exchange Dir-Sync Failing with Event ID 134 =

Article ID: 159295

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 4.0 Standard Edition

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This article was previously published under Q159295



SYMPTOMS
After you apply Microsoft Exchange Server Service Pack 3, directory synchronization (dir-sync) between Microsoft Exchange Server and Microsoft Mail fails. After you turn up diagnostic logging on the Microsoft Exchange directory synchronization agent (DXA), the following event ID appears in the application event log:

Event ID: 134

Type: Error

Source: MSExchangeDX

Category: Event Handler

Description:

Error MH_RC_SESSION_BUSY returned by the MTA. (Thread 812).



CAUSE
Copying the Microsoft Mail Administrator mailbox on outgoing (from Microsoft Exchange Server) dir-sync messages (whether the computer running Microsoft Exchange Server is a dir-sync server or requestor) and then deleting these messages from both the Inbox and Deleted Items folder without reading them causes a non-read notification (NRN) to be returned to the Message Transfer Agent (MTA). The MTA fails during message conversion (MDBEF -> P2) and the message is incorrectly handled.



WORKAROUND
To prevent this problem, do the following:
 * Don't copy the dir-sync administrator on dir-sync messages.
 * Don't delete the dir-sync messages.
 * Open the messages before deleting them.



RESOLUTION
Apply the fix referenced below. The MTA code was fixed to properly handle the message conversion.



STATUS
Microsoft has confirmed this to be a problem in Microsoft Exchange version 4.0. This problem was corrected in the latest Microsoft Exchange 4.0 U.S. Service Pack. For information on obtaining the service pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Additional query words: hang loop looping

Keywords: kbbug kbfix kbusage KB159295

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