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The offline address book file is created in C:\Program Files\Microsoft\Exchange Server\V15\Client Access\OAB folder location by default.
This means that all the recipients are member of Default OAB.
Unlike earlier versions of Exchange, Exchange Server 2013 only supports OAB version 4 as shown above. Before creating an offline address book we need to find which mail server is hosting the OABGen service.
Here, I will show steps to configure offline address book in Exchange 2013.
In Exchange 2013, offline address book is generated by OABGen (Offline Address Book Generation) service that runs on Mailbox server.