When you send an e-mail message from a shared mailbox in Outlook 2007, the sent message is not saved in the Sent Items folder of the shared mailbox

Consider the following scenario:

• You configure the
  DelegateSentItemsStyle
  registry entry for Microsoft Office Outlook 2007.
  
  To do this, you set the DWORD value of the following registry key to 1:
  HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Preferences\DelegateSentItemsStyle
• You open a shared mailbox as an additional mailbox in Outlook 2007.

In this scenario, when you send an e-mail message from the shared mailbox, the message is sent successfully. However, the sent message is not saved in the Sent Items folder of the shared mailbox.

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base: To resolve this problem, install the Outlook 2007 hotfix package that is dated June 30, 2009 and then set the value for the registry entry to enable the hotfix package. To do this, follow these steps:

1. Install the Outlook 2007 hotfix package that is dated June 30, 2009. For more information about this hotfix package, click the following article number to view the article in the Microsoft Knowledge Base:
   970944  (http://support.microsoft.com/kb/970944/ ) Description of the Outlook 2007 hotfix package (Outlook.msp): June 30, 2009
2. Set the value for the
   DelegateSentItemsStyle
   registry entry to enable the hotfix.
    To have us enable the hotfix for you, go to the "Fix it for me" section. If you prefer to fix this problem yourself, go to the "Let me fix it myself" section.
   
   

   Fix it for me

   
   
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   Notes
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   Then, go to the "Did this fix the problem?" section.
   
   
   
   

   Let me fix it myself

   To do this, follow these steps:
   1. Click Start, click Run, type regedit, and then click OK.
   2. Locate and then click the following registry subkey:
      HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Preferences
   3. On the Edit menu, point to New, and then click DWORD Value.
   4. Type DelegateSentItemsStyle, and then press ENTER.
   5. Right-click
      DelegateSentItemsStyle
      , and then click Modify.
   6. In the Value data box, type 1, and then click OK.
   7. Exit Registry Editor.

Important After you set the DelegateSentItemsStyle registry value to 1, the functionality is only available when the Microsoft Exchange account is set to Use Cached Exchange Mode. The DelegateSentItemsStyle registry value will not work consistently on an Exchange account that is configured in Online mode. For more information about enabling Use Cached Exchange Mode, see the following Microsoft Office support article:

Did this fix the problem?

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Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.