You are a messaging professional. Your company uses a Microsoft Exchange
Server 2007 messaging system.

Your company has five offices located in five different regions.

Users use Microsoft Office Outlook 2007 and Microsoft Outlook Web Access (OWA) to access their
mailbox.

Exchange Server 2007 computers are deployed in each office. Each office contains an Exchange Server
2007 computer that runs the Hub Transport server role and the Client Access Server role. In addition,
there is an Exchange Server 2007 computer in each office that runs the Mailbox server role.

All Mailbox servers are configured to use Local Continuous Replication (LCR).

In the event of a single server failure, the company has the following new requirements:

Users must be able to access their mailboxes by using Office Outlook 2007 or OWA.
The flow of e-mail messages must be undisrupted.

You need to meet the outlined requirements. You want to achieve this goal by deploying as few servers as
possible.

What should you do?

A.
Deploy a new computer in each office. Install the Hub Transport server role and the Client Access Server
role on the computer.

B.
Deploy a new computer in each office. Install the Mailbox server role on the computer. Configure LCR on
the new Mailbox server. Move half of the mailboxes to the new Mailbox servers.

C.
Deploy two new computers in each office. Install the Hub Transport server role and the Client Access
Server role on one of the new computers. Install the Mailbox server role on the other new computer. Configure
LCR on the new Mailbox server. Move half of the mailboxes to the new servers.

D.
Deploy two new computers in each office. Configure Cluster Continuous Replication (CCR) on the new
computers, and install a clustered Mailbox server. Move all mailboxes to the clustered Mailbox server. Remove
the Mailbox server role from the Mailbox server in each office. Install the Hub Transport server role and the
Client Access Server role on the server.