Alphonse wrote:

In OL2002 (XP) it works if you give it a second after the third
letter of the name by which they are sorted in the FileAs field.

Outlook 2002 has autocompletion as well as autoresolution (what you describe
here). Enable the feature with ToolsOptionsE-mail OptionsAdvanced E-mail
OptionsSuggest names while completing To, Cc, and Bcc fields.
--
Brian Tillman