Recently upgraded to Exchange 2010 and clients are not getting updates to the Offline Address Book. I have specified the Default Offline Address Book in the Organization -> Mailbox -> Database Management location and have verified that clients are able to download the address book and do not get an error. Replication was also turned on for the Offline Address Book public folder from the old Exchange 2003 to 2010. However, the clients still do not see any new users in the Global Address List when in cached mode. When not in cached mode the new users are there. I have tried manually updating the Offline Address List with no luck. Any ideas?