Autocompletion was not offered as a feature until Outlook 2002. Earlier
versions have a feature called auto-resolution. If you enter part of a name
or a nickname then tab out of the field (or hit Alt-K [Check Names]),
Outlook will attempt to resolve the name against your address book. If it
can't it'll red underline it and you can right click on the name to manually
resolve it. Outlook will save the resolution for future use.

Signature
Russ Valentine
[MVP-Outlook]
> Is there a feature which I can turn on in Outlook, which would
> automatically
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>
> Thanks