it's the nickname cache. Select it using the arrow keys and press Del.
http://www.slipstick.com/problems/nicknamecache.asp

--
Diane Poremsky [MVP - Outlook]
Outlook Tips: http://www.outlook-tips.net/
Outlook & Exchange Solutions Center: http://www.slipstick.com

Outlook Tips by email:


EMO - a weekly newsletter about Outlook and Exchange:


You can access this newsgroup by visiting
http://www.microsoft.com/office/comm...s/default.mspx or point your
newsreader to msnews.microsoft.com.


"Jim A." wrote in message
...
When I try to address a new e-mail message, Outlook automatically brings
up
an old e-mail address for the person in question, not the one in my
Contacts
list. I type "Tom" and Outlook furnishes the old address for Tom not the
one
listed in Contacts. I do not have an outlook address book. This is a
real
mystery.