Tip 621: Outlook.sharing.xml.obi

If you snoop around the Outlook folders on your hard drive (%USERPROFILE%\Application Data\Microsoft\Outlook and %USERPROFILE%\AppData\Roaming\Microsoft\Outlook) you may see two new files – outlook.sharing.xml.obi and Outlook.xml.kfl.
Outlook 2007 creates these files – the <profilename>.sharing.xml.obi file contains RSS subscription names. The <profilename>.xml.kfl file contains the Known Feed List for RSS which is shared with IE. If you aren’t sharing your RSS feeds, you may not have the KFL file.