When an address you no longer want to use pops up, simply use the arrow keys to select it, then press Delete.

Signature
Sue Mosher, Outlook MVP
Author of
Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> In a new memo, Outlook suggests already used name entries based on initial
> characters (autosearch). However, I far as I know, the names that were ever
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>
> http://www.microsoft.com/office/community/en-us/default.mspx?mid=a79fd690-d93c-4
8ef-aa7e-89bcf38e05da&dg=microsoft.public.outlook.contacts