As always, the video guide to creating a new Offline Address Book is at the bottom of the page.Now first a bit of info; The GAL, Global Address List, is a list of all contacts and Email enabled users in Exchange, if your version of outlook is not in cached mode then outlook connects directly to the GAL and will pull all its contacts from the organization from there.
For the version for Exchange 2007, click here: Offline Address Book Errors - Exchange 2007 With the introduction of cached mode in Outlook 2003 and higher, the Exchange offline address book has become more critical.
Users have complained for months that Public Folder Favorites were not being cached in Outlook 2016, even though caching Public Folder Favorites was enabled in Account Settings, More Settings.
This also affected the ability to search public folders: because the items weren't cached, Outlook wasn't indexing the folder contents.
While changing rebuild schedule for the OAB isn't recommended by Microsoft, but you may wish to make the change.
Offline address book is used by Office Outlook so that users can locate contact information even when they are not connected to the server.