Your company has a data center in New York and a data center in Miami. The company has
an Exchange Server 2013 organization that contains a database availability group (DAG).
The DAG contains servers in both data centers. The company plans to deploy Outlook
Anywhere to all users. You configure the following:
• All of the Exchange Server 2013 virtual directories in the New York data center use a
host name of mail.contoso.com.
• All of the Exchange Server 2013 virtual directories in the Miami data center use a
host name of miami.mail.contoso.com.
• In each data center, a certificate from an enterprise certification authority (CA) is
configured to contain the following:
• A certificate principal name of mail.contoso.com
• Subject alternate names of mail.contoso.com and miami.mail.contoso.com
You need to recommend which task must be performed to meet the following requirements:
• Users always must attempt to connect first to a server in the data center where their
mailbox is located.
• Users must be able to access their mailbox if a single data center fails.
What should you recommend?

A.
Change the external host name of the Miami data center to mail.contoso.com.

B.
Modify the ExternalUrl of the Autodiscover virtual directory of the Client Access servers.

C.
Run the Set-OutlookProvider cmdlet.

D.
Run the Add-AvailabilityAddressSpace cmdlet.