From the Tools menu choose Send/Receive then Download Address Book
Click on OK.
The update will take a minute or two. Then all the latest changes that have been made will reflect in the list you are using.
From the Send/Receive menu choose the dropdown folder option for Download Address Book. As for Outlook 2007, click OK and allow to update.
From the Tools menu, choose Send/Receive, and then click Download Address Book.
In the Offline Address Book dialog box, make sure that the Download changes since last Send/Receive check box is checked and click OK.