What should you recommend?

A corporate environment includes Exchange Server 2010. The environment is configured as shown in the following table.

Server name Location Exchange Server 2010 role
HQ-HTCAS1 Main office Hub Transport, Client Access Client Access server array FQDN is exchange.contoso.com
HQ-HTCAS2 Main office Hub Transport, Client Access Client Access server array FQDN is exchange.contoso.com
HQ-MBX1 Main office Mailbox, Member of the database availability group (DAG)
HQ-MBX2 Main office Mailbox, Member of the DAG
DR-HTCAS1 Disaster recovery site Hub Transport, Client Access Not part of an array
DR-MBX1 Disaster recovery site Mailbox, Member of the DAG

The company is planning to test a complete site failover. You have the following requirements:

* Ensure that users can connect to their mailboxes in the disaster recovery site by using Microsoft Outlook 2010.
* Minimize downtime during the site failover.
* Minimize client connectivity issues after the site failover.

You need to recommend a solution that meets the requirements.

What should you recommend?