That would depend on your Outlook version which you should never fail to
mention when you ask a question.
In my my version it is in Tools > Options > Preferences > Email Options >
Advanced Email Options > Select "Automatic Name checking"
Ah, you must be referring to the incomplete Mailing address "Check
Address" dialog box when creating a new contact.
I don't know how to access this from Outlook UI, but here is a sequence
of steps involving a keyboard shortcut.
1. Start entering a new contact with incomplete address
2. Press Alt-D
3. You'll see the checkbox you are looking for
--
Leonid S. Knyshov
Crashproof Solutions
510-282-1008
Twitter: @wiseleo http://crashproofsolutions.com
Microsoft Small Business Specialist
Try Exchange Online http://bit.ly/free-exchange-trial
Please vote "helpful" if I helped you