It's because fax numbers ARE valid electronic addresses.
The standard behavior for the Outlook Address book is to display all
electronic addresses (both fax and e-mail). That behavior cannot be changed.
The only way to prevent the display of fax numbers is to store them in a
different field or to disguise them (e.g., precede them with an alpha
character) so that Outlook won't recognize them as phone numbers.
--
Russ Valentine
[MVP-Outlook]
"Opus" wrote in message
...
For some reason, my Outlook Address Book thinks that a fax number is a
valid
e-mail address. When I put a contact name in the address line of a new
e-mail, the auto finder asks me to choose between the normal e-mail
address
(SMTP) and the contact's fax number (FAX). When I open the address book,
there are two e-mail types listed in the "E-mail Type" column: SMTP and
FAX.

How do I reset Outlook so that it doesn't have this issue?

Thanks.