You are the administrator of a Windows Essential Business Server 2008 environment. The Messaging Server is configured as a Mailbox Server, Client Access Server, and a Hub Transport Server. You want to enable Outlook Anywhere so users can connect to the Messaging Server from any location through the Internet.

Which type of certificate should you install for this purpose?

A.
Install a valid Secure Sockets Layer (SSL) certificate that is trusted by the Messaging Server.

B.
Install a valid Secure Sockets Layer (SSL) certificate that is trusted by the clients.

C.
Install the default Secure Sockets Layer (SSL) certificate that is created by Exchange Setup.

D.
Create and install a self-signed certificate that is trusted by the Messaging Server.

Explanation:
You should install a valid SSL certificate that is trusted by the clients. Outlook Anywhere is a new feature of Exchange Server 2007 that enables Microsoft Outlook 2007 and Outlook 2003 clients to connect to their Exchange servers over the Internet by using the Remote Procedure Call (RPC) over HTTP Windows networking component. To use Outlook Anywhere, you must install an SSL certificate that is trusted by the client.

You can also configure Outlook Anywhere to use multiple SSL certificates. When you do this, the client computers that are joined to your domain will contact Active Directory and obtain the site address for the AutoDiscover service from the Service Connection Point (SCP) object. Clients that are either not joined to the domain or that do not have direct access to Active Directory will contact the DNS server to obtain the site address for the AutoDiscover service SCP object.

You should not install a valid SSL certificate that is trusted by the Messaging Server, install the SSL certificate that is created by Exchange Setup, or create and install a self-signed certificate that is trusted by the Messaging Server. To use Outlook Anywhere, you must install an SSL certificate that is trusted by the client.