XADM: BCC Recipients Are Visible in an Embedded Message

ID: Q189999

The information in this article applies to:

Microsoft Exchange Server, versions 5.0, 5.5
Microsoft Exchange Windows 3.x client, version 5.0
Microsoft Exchange Macintosh client, version 5.0
Microsoft Outlook for Windows 3.x, Exchange Server Edition, version 8.0
Microsoft Outlook for Macintosh, Exchange Server Edition, version 8.0

SYMPTOMS

When a recipient of message that has been sent as a BCC to other recipients embeds this message in another message, the BCC recipients become visible in the embedded message. This only occurs with the Windows 3.x or Macintosh clients. 32-bit Windows clients do not display this behavior.

CAUSE

Attachments (including embedded messages) do not have the delivered flag set during a CopyTo operation. Because BCC display is based on whether the message has been delivered, this causes the BCC recipients to be shown at all times. Outlook 32-bit Windows clients are using a fast transfer mechanism that strips off the BCCs during the copy (instead of a CopyTo as the Windows 3.x and Macintosh clients are using). This explains the discrepancy between the client behaviors.

RESOLUTION

For Exchange Server version 5.5: To resolve this problem, obtain the latest service pack for Exchange Server version 5.5. For additional information, please see the following article in the Microsoft Knowledge Base:

Q191014 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.0.

A supported fix is now available, but has not been fully regression-tested and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft recommends that you wait for the next service pack that contains this fix. Contact Microsoft Technical Support for more information.

This fix has been posted to the following Internet location:

ftp://ftp.microsoft.com/bussys/exchange/exchange-public/fixes/Eng/Exchg5.0/Post-SP2-STORE/

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.5.

MORE INFORMATION

During the message Config, the delivered flag is set according to the message flags. During a CopyTo, if the destination is an embedded message, the delivered flag is based off of the source item.

Additional query words:

Keywords : XADM exc5 exc55
Version : MACINTOSH:8.0; WINDOWS:5.0,8.0; winnt:5.0,5.5
Platform : MACINTOSH WINDOWS winnt
Issue type : kbbug