Do you want to change the default file folder Outlook 2003 uses for attachments? While you can't set a folder for attachments you send, you can set one for storing received attachments. You need to navigate to
HKEY_CURRENT USER\Software\Microsoft\Office\11.0\Outlook\Options
and add a string value called DefaultPath then enter the folder path.
The next time you use the File, Save attachment menu, Outlook's save explorer opens to that folder.
Tip: This key (adjusted for your version of Outlook) also works in Outlook 2007 and up. However, it can mess up default location used by the Insert attachments dialog.
If you use an older version of Outlook or to make it easier to access folders when sending attachments, your best bet is creating a folder on the places bar. See Places bar customizations for instructions.
Published November 17, 2005. Last updated on August 14, 2016.