yes you have to check cache mode and then download new OAB if probel still persists then rename below file from user profile then restart the computer .
C:\Documents and Settings\user profile \Local Settings\Application Data\Microsoft\Outlook
----- Original Message ----
From: Greg Herzog <glherzog@xxxxxxxxxxx>
Sent: Thursday, 25 October, 2007 7:36:28 PM
Subject: [ExchangeList] Re: Updating GAL
check to see if he's in cached mode. we get that all the time. if so, either turn it off, or manually force a download of the offline address book.
----- Original Message -----
Sent: Wednesday, October 24, 2007 8:37 PM
Subject: [ExchangeList] Updating GAL
I have a single user whose Global Address is not updating. He is using Outlook 2007 and we are running Exchange Server 2003.