You have an Active Directory domain named contoso.com.

You have an Exchange Server 2010 organization that contains a Client Access server named CAS1. Users connect to CAS1 from the Internet using mail.contoso.com.

The organization contains the following mobile clients:

* Windows Mobile 5.0
* Windows Mobile 6.1
* Windows Mobile 6.5

You plan to install a certificate on CAS1.

You need to ensure that all clients can connect to CAS1 from the Internet using Exchange ActiveSync.

Which name should you include in the certificate?

A.
*.contoso.com

B.
CAS1.contoso.com

C.
EAS.contoso.com

D.
mail.contoso.com