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?