See attached for a free program that will allow you to view and export the email addresses in a NK2 file. You'll need to unzip it and then run it.
- For Outlook 2007, the autocomplete stream is stored in a file with the same name as the profile and an extension of .nk2.
- For example, if the default profile of “outlook” is used, the file will be called “outlook.nk2”.
- The .nk2 file is stored in %APPDATA%\Microsoft\Outlook.
- For more general information, see: http://msdn.microsoft.com/en-us/library/office/ff625288(v=office.14).aspx