You have an Active Directory forest named contoso.com.

You install a new Exchange Server 2010 organization that contains a Client Access server named CAS1.

You need to configure certificates in the organization to support the following client connections:

* Autodiscover
* Outlook Anywhere
* Exchange ActiveSync

Your solution must minimize costs.

What should you do?

A.
Re-issue a self-signed certificate to CAS1.

B.
Restore a previous version of the default self-signed certificate to CAS1.

C.
Issue a trusted certificate that contains a single subject alternate name.

D.
Issue a trusted certificate that contains multiple subject alternate names.