Which version? It's either stored in the *.NK2 (ol2002/03) or the *.nick
(older versions) file - you can delete it from the *.NK2 but need to delete
the *.nick file.
http://www.outlook-tips.net/beginner/filepath.htm

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Diane Poremsky [MVP - Outlook]
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> I've changed a friends email address very carefully twice knowing that
> maintaining changes has been difficult. I "saved and closed" and I
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>
> Thanks for any help you can offer.