In freshly installed Outlook 2007, I have 330 people in my "Contacts" list. When I start typing in the "To" field, no names are suggested (until after I have sent an email to the person). This seems idiotic and broken.
Under "Advanced Email Options" the "Automatic name checking" and "Suggest names..." items are both selected. Under the properties for the "Contacts" folder, the "Show this folder as an Address Book" box is selected (and grayed out). I have tried deleting my "Outlook.NK2" file. I have tried addressing an email to everybody in my Contacts list, but then deleting it rather than sending it
In addition, there is another weird behavior. When I open "Address Book: Contacts" by going to Tools > Address Book, all of the people in my Contacts folder show up, but about 40% do not have anything under the "Name" or "Display Name" heading. Yet, if I open those contacts (properties), they have both names and display names, and there is no visible difference between the entries for the 40% that do no show them, and the 60% that do.
Outlook is a very messed up program.