Delete OAB Outlook 2010

Outlook 2010 downloads a copy of the Global Address List (GAL) from the Active Directory/Exchange every 24 hours (it checks to see if 24 hrs have elapsed since the last download).

It stores this download locally in the Offline Address Book (OAB).

If someone's details change, you won't normally see them up to a possible 24 hours. But what if you want to see them more quickly?

Close Outlook. Then go to C:\Users\%username%\AppData\Local\Microsoft\Outlook\Offline Address Books\

Delete everything in here.

Then re-open Outlook. It can take a minute or two to download the entire address book again.