Manually Update the Global Address List in Exchange 2010

Here is the command to update the GAL in exchange.  If your address list is not the default add the name in.

update-globaladdresslist -identity "default global list"

To update the users cache copy faster also make sure you sync your CAS server's also.

Update-FileDistributionService -Identity Server1 -Type "OAB"

Now if the user manually updates their address book using outlook they will download the latest copy.