Hi,
If the nk2 file is lost from the original location, it is tough to retrieve it back. What you can do is recreate the nk2 file using the sent items and it is a well known fact that not all the email addresses that are used to send emails are from the address book in outlook and all the senior execs prefer to use the cached file as their address book.
Go to
http://nk2.emenems.net/.
Click on download as zip file link and save the file to desktop and extract it.
Run the setup.exe file
Frm the screen that pops up , choose add additional folders,
Choose sent items. once done , click on auto rebuild
the tool will go through your sent items in your outlook, you may even chooseother folders also if you want.
and it places the nk2 file back in the application data \microsft\outlook folder.
This has worked for me and saved life when it comes to ceos and all of them
all the best.
