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
322756 How to back up and restore the registry in Windows
To work around this issue, add and enable
the DelegateSentItemsStyle registry entry. This forces Outlook to store
messages in the Sent Items folder of that same shared mailbox when the messages
are sent from a shared mailbox.
If you're running Outlook 2010, install the Outlook 2010 hotfix package that's dated December 14, 2010. For more information about this hotfix package, see the following Microsoft Knowledge Base article:
2459115 Description of the Outlook 2010 hotfix package (outlook-x-none.msp): December 14, 2010
Note The x.0 placeholder represents your version of Office (16.0 = Office 2016, 15.0 = Office 2013, 14.0 = Office 2010).
3. On the Edit menu, point to New, and then click DWORD
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.