You install a new Client Access server into your Exchange Server 2007 environment. Your company domain is named contoso.com. You create a new DNS A resource record that points autodiscover.contoso.com to the external IP address of the Client Access server. Users report that they are unable to use the Autodiscover service. However, the users are able to access Outlook Web Access, which is on the same server as the Autodiscover service. You need to ensure that all users are able to use the Autodiscover service. What should you do?

A.
Create a DNS SRV record that points to autodiscover.contoso.com.

B.
Create a DNS CNAME record that points autodiscover.contoso.com to your Mailbox servers DNS name.

C.
Create a DNS CNAME record that points autodiscover.contoso.com to your Client Access servers DNS name.

D.
Install a trusted encryption certificate on your Client Access server.

E.
Install a trusted encryption certificate on your Mailbox server.