it's a file with the extension NK2 and found at C:\Documents and
Settings\username\Application Data\Microsoft\Outlook - but if it's gone,
it's likely it was damaged and replaced. It's not meant to be a substitute
address book, just a faster way to access frequently used addresses.

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Diane Poremsky [MVP - Outlook]
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> Some stupid carpet cleaning people came in today and moved my computer
> causing most of the connections to be yanked out of the back. Now on my
> outlook, the Autocomplete feature does not function. Anybody know how to
> retrieve the list...I only have about 500 people I reach by the first
> three
> letters of their e-mail.
rcole@runflat.com - 09 Jan 2006 22:46 GMT
Thank you, Diane...
> it's a file with the extension NK2 and found at C:\Documents and
> Settings\username\Application Data\Microsoft\Outlook - but if it's gone,
[quoted text clipped - 7 lines]
> > three
> > letters of their e-mail.