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

The company plans to deploy an Exchange Server 2007 Client Access Server that will be accessible on the Internet.

Users often access their mailboxes in Internet cafes by using Microsoft Outlook Web Access (OWA).

When users connect through public computers, a security alert is displayed.

The company has the following messaging requirements:

Users must not receive any security alerts while using OWA on public computers.

Authentication credentials must be encrypted when transmitted on the Internet.

You need to meet the messaging requirements.

What should you do to meet the messaging requirements.?

A.
Modify the properties of the OWA Virtual Directory to use Integrated Windows authentication.

B.
Modify the properties of the Client Access Server to set NTLM authentication for Microsoft Office Outlook
Anywhere.

C.
Purchase an SSL certificate from a third-party Trusted Root Certification Authority and assign it to the
default Web site.

D.
Purchase an SSL certificate from a third-party Trusted Root Certification Authority. Modify the properties
of the OWA Virtual Directory to enable client certificate mapping.