Microsoft KB Archive/235455

= XCON: Modification in X.400 Blind Copy Implementation =

Article ID: 235455

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 5.5 Standard Edition

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This article was previously published under Q235455



SYMPTOMS
When an Exchange Server computer sends a message with blind copy (Bcc) recipients through an X.400 connector, the primary and copy recipients cannot see the Bcc recipients if they are all on an Exchange Server computer. However, if the recipients' mailbox is not on an Exchange Server computer, but on a third-party X.400 message transfer agent (MTA), they may be able to see the Bcc recipients.



RESOLUTION
To resolve this problem, obtain the latest service pack for Exchange Server version 5.5. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

191014 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack

The English version of this fix should have the following file attributes or later:

Component: Information Store

Component: Information Store



STATUS
Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5. This problem was first corrected in Exchange Server 5.5 Service Pack 3.



MORE INFORMATION
The current implementation of the Bcc functionality in Exchange Server is modified by sending two different messages: one without Bcc recipients and one for the Bcc recipients. This guarantees that primary and copy recipients cannot see the Bcc recipients, no matter what remote third-party MTA is used.

Additional query words: X.400 X400

Keywords: kbhotfixserver kbqfe kbbug kbfix kbqfe KB235455

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