Microsoft KB Archive/174344

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XCLN: Private Messages Can Be Viewed by Delegates Using Exchange

Article ID: 174344

Article Last Modified on 10/28/2006


  • Microsoft Exchange Client 5.5
  • Microsoft Exchange Client 5.0
  • Microsoft Exchange Client 4.0
  • Microsoft Exchange Client 5.0
  • Microsoft Exchange Client 4.0 for Macintosh
  • Microsoft Exchange Client 5.0 for Macintosh

This article was previously published under Q174344


A delegate for another user's mailbox can read messages marked as Private using the Microsoft Exchange Client. This behavior does not occur when using the Microsoft Outlook client.


The Microsoft Outlook client is designed to filter messages marked as Private so that only the intended recipient can view the message through his or her Inbox. This filtering process prevents delegates from viewing the contents of private messages that were intended for the original recipient only. The Microsoft Exchange Client ignores this sensitivity property and displays the messages to the delegate, as well as to the original recipient.


To ensure privacy, have the delegate for the user's mailbox install and use the Outlook client only.

Keywords: kbprb KB174344