After unsubscribing to a shared contact, it is not automatically removed from the “Select Names” dialog.
To remove the shared contact from this list, two solutions exist:
If the subscribed contact has been added to the Select Names dialog, uncheck the “Show this folder as an e-mail Address Book” checkbox from the Outlook Address Book property page before unsubscribing from the contact.
Remove the contact directly from the address book properties:
In Outlook XP:
Select Tools->Email account.
Choose “View or change existing directories or address books” and select “Microsoft Outlook Address Book” to change.
Select the item to remove from your address book.
In Outlook 2000:
Select Tools->Services from the Outlook menu.
The Services window is displayed.
Select the Services tab.
Select “Outlook Address Book” from the list of services set up in your profile and click Properties.
The Microsoft Outlook Address Book properties window is displayed.
Select the item to remove from your address book and click close.
The user must log out and log in again for the change to take effect.