You have a Microsoft Exchange Server 2019 organization that contains mailbox servers in four Active Directory sites. The organization contains 35,000 user mailboxes. The network bandwidth between the sites is limited.
Users frequently travel between the sites.
You need to ensure the users download the offline address book (OAB) from a local server.
What should you do?
A . Create an arbitration mailbox in each site and configure shadow copies of the OA
C . Modify the OAB virtual directories on the Exchange servers in each site to use unique URLs.
D . Place the arbitration mailbox of the OAB in a database that replicates between the sites by using a database availability groups (DAG).
E . Create a separate OAB and arbitration mailbox in each site.
Answer: A
Explanation:
References: https://docs.microsoft.com/en-us/exchange/email-addresses-and-address-books/offline-address-books/offlineaddress-books?view=exchserver-2019
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