The Outlook AddressBook allows for the sorting of the AddressBook names in either <First/Last Name> format or based on the value of the <FileAs> field. The example shown beside the Outlook AB setting for FileAs shows <Last, First> but that is simply an example of what the FileAs field can contain. A common misconception is that when the default format for the FileAs field is changed (i.e. from First/Last to Last/First) in the Outlook user-interface then the AddressBook will automatically list the AB in the format set for the FileAs field. The reality is that when the AddressBook is set to display in FileAs order, it will utilize the contents of the FileAs field as it exists regardless of whatever the default setting for the FileAs field happens to be. The FileAs field gets populated using the current default setting when the contact item gets created OR one of the component fields gets modified (FirstName, LastName, CompanyName). Simply changing the default FileAs format does not alter the contents of any pre-exisiting contact items. Those will need to be changed manually or programmatically using a macro or 3rd party utility. When importing new contact items using the Outlook import wizard, the FileAs is set to Last/First regardless of what the default FileAs format is set to in the Outlook user-interface. For a more detailed overview of the Outlook Address Book – see “Understanding the Outlook AddressBook” An overview of how to change the Outlook Address Book settings can be seen in