Update Your Copy of the Global Address List (GAL) in Outlook 2010
STEP 1: With Outlook 2010 open, click the File tab.
STEP 2: Click Account Settings, then click Download Address Book.
STEP 3: Perform the following actions, then click OK.
- Uncheck Download changes since last Send/Receive
- Select Full Details
- Choose \Global Address List
A new version of the Global Address List will be downloaded. The status window will open to indicate that the download is in progress and will close automatically when the download is complete.