You are a messaging professional. Your company uses a Microsoft Exchange Server 2003 messaging system. All client computers run Microsoft Internet Explorer version 7 to access Microsoft Outlook Web Access (OWA).

The company plans to upgrade to the Microsoft Exchange Server 2007 version of OWA. You install OWA on a new Exchange Server 2007 Client Access Server. You change the Address (A) record for OWA access to point to the new Client Access Server.

Users report that they are not able to access OWA 2007 features.

You need to ensure that clients are able to access OWA 2007 features.

What should you do to ensure that clients are able to access OWA 2007 features.?

A.
Configure an A record for a host named Autodiscover that points to the IP address of the new Client Access
Server.

B.
Implement an Exchange Server 2007 Unified Messaging server.

C.
Move all mailboxes to an Exchange Server 2007 Mailbox server.

D.
Add the fully qualified domain name of the OWA server to the Trusted Sites zone of Internet Explorer.