Consider the following scenario. You use Outlook 2010 and are a delegate for your manager. Even though the DelegateSentItemsStyle registry value is set to 1, an email message that you send on behalf of your manager is saved in your Sent Items folder.
Key: HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\PreferencesIn earlier versions of Outlook, the same registry value forces the email message to be saved in the Sent Items folder of the person on whose behalf the message was sent.
Name: DelegateSentItemsStyle
Type: DWORD
Value: 1