24/02/13If you create a new user, give them a mailbox, and they seemingly fail to appear then don’t panic! The easiest way to do this is simply connect to Outlook Web Access, and query the GAL directly (OWA uses the GAL no the OAB like Outlook running in cached mode does). The User/Mailbox IS listed on the Server But NOT in Outlook.
Firstly and fore mostly: If you do anything in Exchange: Apply the “cup of coffee rule”, never make a change then go and prove that change works straight away! However most of us work in the real world and you have a user who needs to use this mailbox yesterday! Remember, if you are looking at the Global Address List in Outlook then you are NOT looking at the Servers Global Address List*.
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.
Make sure the OAB you are looking at, has been updated from the GAL. If using Outlook, query the GAL directly, or download the latest OAB. Before you do anything send the user you created a ‘Test Email’ from your own account.
If you are using Outlook 2003 or 2007 you may be in “Cached Mode”, and you are looking at a copy called the “Offline address book” This only gets updated Every 24 hours, and the copy on the server only gets updated every 24 hours at (by default).
If you create other Contacts folders, each of these folders is also listed in the Address Book list, available for you to choose from.The OAB files are stored in the same place as we have in Exchange 2013 CAS server but now it will be on Exchange 2016 Mailbox server itself since we do not have the CAS role.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.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.