In Outlook 2013 I have a workstation that, for some reason, won't let the user type the name of a contact in the To field. I look at the user's contact properties for the address book that he's using and I see that "show this folder as an email address book" is checked, but greyed out. I look at Outlook Options under the mail tab and I see that "Automatic Name Checking" is checked.
This workstation is part of a domain, but they're not using Exchange, Oulook is using POP and IMAP.
What else to look for?