Outlook address book not updating in cached mode 2016
This document seeks to address and clarify the small misunderstanding surrounding the GAL (Global Address List) and the OAB (Offline Address Book).
Quite often all Administrators, even Exchange Administrators simply refer to the users they see in the Address section of Outlook casually as the GAL for ease of reference, but really more often than not, you are looking at the OAB.
However sometimes in large complex organisations we have a situation where a new joiner joins and their colleagues want to email them immediately, but they don’t appear in Outlook for them so they call the Helpdesk “Why isn’t Joe Bloggs in the GAL??
” Well, the truth of the matter is that our new joiner Joe is in fact , an update to the Address Book won’t become available to the user until about 48 hours after the change.
Because of this, a new user may not be visible in the address book, or changes to a user’s name, address, etc.
may not be available even though such changes have been made in Active Directory.
This can occur even though no errors are present within the OAB rebuild process.
(* on the Server running it) As mentioned before, this is only for Exchange 2010, Exchange 2013 avoids this step through the use of proxying For example, if you complete an offline address book download at today, Outlook will start the offline address book download the next day at approximately .
Therefore, different people will receive updates at different, random times.
1) Try a manual Re-Sync 2) Close Outlook and delete the *.