Ok this is a quick question. When ever i add a new addition to the address book everyone gets the update no problem straight away which is what you would aspect. The problem i have is people on cached mode do not. It can take up to 48 hours to get the update, even if you do a download the address book from the client or delete the OST and then re crate it you don't get the updates.I can not find any errors in events with the OAB.Is there anything that can be done to speed upthe update or is there something wrong?ThanksLuke

Hi,This is default behaviour.When Outlook runs in cached mode it uses the offline addressbook which gets created at 04:00 each night by default. After this creation Outlook then have to download the new modified offline address book.Leif

Hi Luke, Please refer to following KB: Administering the offline address book in Outlook 2003 and Outlook 2007 http://support.microsoft.com/kb/841273/en-us Mike