Depends entirely on the method you use to import and the data source, none
of which you stated.
Explain in detail what you are doing and what happens.

Signature
Russ Valentine
[MVP-Outlook]
>I am trying to udate existing contacts by importing information from
>another
> program. The problem I am experiencing is it either overwrites all data
> or
> duplicates contact. Is there any way to import new data and keep the old
> info?