Please use the steps below to update your Global Address Book.In order for some GAL entries to show up properly you may need to turn off Cached Exchange Mode.
In this case your global address book will update each time Send/Receive is pressed.
A fairly common (and annoying) problem which seems to like to popup after migrations, yet not unsolvable.
In addition to this there a a few methods by which your Outlook clients get the offline address book.*Note: Unless you are NOT in cached mode.
Outlook 2003 (and older)* clients get their OAB from a public folder, Outlook 2007 (and newer) clients can get their OAB from 'Web-based distribution' (basically form the website on the Exchange (or Exchange CAS) server.
Please visit the document on How to turn on or off Cached Exchange Mode for (Outlook 2007, Outlook 2010, and Outlook 2013).
Outlook 2011 does not use Exchange Cached mode and directly connects to the Global Address Book (GAL) via LDAP connection.
They do for my colleague sitting next to me, so I don’t think it is a server misconfiguration or something like that.
Is there any way I can force a manual update of the Offline Address Book (OAB) in Outlook or reset it completely otherwise?
When changes occur within the main Global Address Book (GAL) on the Exchange server, computers running Outlook 2007, 2010, and 2013 may not automatically receive the updates.