Outlook 2007 cannot read Windows Address Book files. You'll need to open them back up in WAB and export them as a MS Exchange format.
- In Outlook, go to your Contacts section.
- From the View menu, select Current View, and then By Category.
- Highlight the category you want to send email to by clicking it.
- In Outlook 2007, from the Actions menu, select Create, and then New Message to Contact. In Outlook 2000, 2002, or 2003, from the Actions menu, select New Message to Contact.
From the File menu, select Import, and then select Messages, choose the software you wish to import from and click next, browse to the location of your messages then click next, choose to import the messages from All Folders, then click next. Click Finish to import your email messages.