If your contact list is out of date, you can force a fresh download directly from the Outlook interface: Administering the offline address book in Outlook

C:\Users\%username%\AppData\Local\Microsoft\Outlook\Offline Address Books\ C:\Users\%username%\AppData\Local\Microsoft\Outlook\ Windows XP (Legacy)

C:\Documents and Settings\%username%\Local Settings\Application Data\Microsoft\Outlook\