3)Exchange 2016 Mailbox Client access service queries Active Manager and finds out database hosting organization Arbitration mailbox.
4)Then OABGen Assistant from the Arbitration mailbox will provide the required information.
5)Like with Exchange Web Services, Autodiscover will provide the Offline Address Book URL.
This request will then be proxies to OABGEN mailbox which had the OAB information and this information is served back to the client.
The contacts in your Outlook 2007 Contacts folder make up the contents of the Outlook Address Book.
If you create other Contacts folders, each of these folders is also listed in the Address Book list, available for you to choose from.
Therefore, not all the information in the GAL is available in the offline address book.
The following information in the GAL isn’t available in the offline address book: Outlook must be able to access Exchange to obtain this information.
In Exchange 2016, the OAB files are generated and stored in the Organization arbitration Mailbox with persisted capability first and later copied to the location %Exchange Install Path%\Client Access\OAB\ folder in the Mailbox Server.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.It can be accessed when using a CUMC email (@cumc.columbia.edu) account with Outlook or when logged in to the Outlook Web App.If you are not seeing correct contact information in the GAL for someone that has a valid email address (i.e.