You have an Exchange organization. All servers in the organization have Exchange Server
2010 Service Pack 1 (SP1) installed.
The network contains two Active Directory sites named Site1 and Site2. Each site contains
two Client Access servers. All mailbox databases in the organization are replicated to
Mailbox servers in both sites.
All users connect to their mailbox by using Microsoft Office Outlook 2003.
You create a Client Access server array named arrayl.contoso.com in Site1, and then
configure all users to connect to arrayl.contoso.com.
You verify that all users can connect successfully to arrayl.contoso.com.
One month later, all of the servers in Site1 fail.
You need to ensure that all users can connect to a Client Access server in Site2 by using
arrayl.contoso.com.
What should you do?

A.
Modify the host (A) record for arrayl.contoso.com to point to the IP address of a Client
Access server in Site2.

B.
Create a Client Access server array named array2.contoso.com in Site2. Rename
array2.contoso.com as arrayl.contoso.com.

C.
Modify the host (A) record for autodtscover.contoso.com to point to the IP address of a
Client Access server in Site2.

D.
Create a Client Access server array named array2.contoso.com in Site1. Remove all of
the Client Access servers from arrayl.contoso.com.

Explanation: