An Outlook 2007 e-mail message remains in the Outbox after you have moved it to a personal folder

Important This article contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:

Consider the following scenario:

• You configure Microsoft Office Outlook 2007 to run in Cached Exchange Mode. In this case, Outlook 2007 uses an offline folder (.ost) file to store e-mail messages and other items.
• Outlook 2007 has access to one or more personal folders (.pst) files.
• When you reply to a message that is stored in an offline folder, you manually copy the message to a personal folder.
• You copy the reply to this message from the Sent Items folder in the offline folder to the Sent Items folder in the same personal folder.

In this scenario, when you log on to the online account that uses this personal folder, the Outbox folder indicates that there is a message that is waiting to be sent. This message is visible only in Outlook Web Access. The message is not visible in Outlook 2007.

How to obtain the hotfix

This issue is fixed in the Outlook 2007 Hotfix Package that was released on February 7, 2008. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

To enable this hotfix, follow these steps:

1. Exit Outlook 2007.
2. Start Registry Editor.
   • In Windows Vista, click Start
     Collapse this imageExpand this image

     
     , type regedit in the Start Search box, and then press ENTER.
     
     
     Collapse this imageExpand this image

     
     If you are prompted for an administrator password or for confirmation, type the password, or click Continue.
   • In Windows XP, click Start, click Run, type regedit, and then click OK.
3. Locate and then right-click the following registry subkey:
   HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Cached Mode
4. On the Edit menu, point to New, and then click DWORD Value.
5. Type SendOne, and then press ENTER.
6. Right-click SendOne, and then click Modify.
7. In the Value data box, type 0, and then click OK.
8. On the File menu, click Exit to exit Registry Editor.

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