Help with Outlook 98

[CrashSeven]

I know, I know: Outlook 98 is old. But it's all I've got. I'm trying to get Outlook 98 to automatically recognize an e-mail address after just a few characters being typed in to the "TO" or "CC" window. Can anyone tell me how this gets set up?

System details:

Win 98 SE OS
128 MB RAM
Office 97
Outlook 98 (w/ SR1, SR2 and ValuePak1)