Unable to display BCC recipients in journaled email messages on Microsoft Exchange Server 2007 and up.
Microsoft Exchange 2000 and 2003 have a feature called BCC Journaling. This feature allowed end-users to view the BCC recipients of a journaled email in Microsoft Outlook.
In Microsoft Exchange 2007 and up, Message Journaling has changed - only Envelope Journaling is available. Please see the following Microsoft TechNet article for details - http://technet.microsoft.com/en-us/library/bb738122.aspx
Envelope Journaling does not show the BCC recipient information when the email message is viewed in Microsoft Outlook. The BCC information is only captured in the Journal Report. The Journal report is only used by Enterprise Vault indexing.
This behavior is by design. The Enterprise Vault Search web applications are able to search on BCC recipients, however the BCC recipients will not display in the search results or when viewing the email message. To be able to search and view the BCC recipients for a journaled email, Discovery Accelerator must be used. Discovery Accelerator 8.0 or greater with the ECM-API enabled displays the BCC recipients in the Review Page preview pane or the Review Page Column list (All Recipients).