Do your contacts use a custom form? THat's the one known cause of the duplicate checking not working.

--
Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
http://www.turtleflock.com/olconfig/index.htm
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx

"reiner" wrote in message ...
Outlook 2003, Tools\Options\Contact Options I have selected "Check for
duplicate contacts".

Outlook help says this is supposed to do the following...
"If you save a contact with the same name or e-mail name as one that already
exists in your Contacts folder, Microsoft Outlook will display a dialog box
that allows you to either add the new contact or update your existing contact
with the new information from the new contact."

but I never get the dialog box when I enter a duplicate name. Help!