Your company has an Active Directory forest named contoso.com. 
You plan to deploy an Exchange Server 2010 organization that will contain two servers. 
Each server will have the Client Access server role， the Hub Transport server role， and the Mailbox serverrole installed. 
You plan to add both servers to a database availability group （DAG）. 
You need to recommend a high-availability solution for the Client Access server role. 
Your solution must ensure that users are not prompted to authenticate if a Client Access server becomesunavailable. 
What should you recommend？（）

You have an Exchange Server 2010 organization and an Active Directory Rights Management Services（AD RMS） server. 
All users access their mailboxes by using Outlook Web App （OWA）. 
You need to plan a security solution for the organization to meet the following requirements：.Secure messages by using administrator-defined templates 
.Ensure that e-mail messages sent by users can be stored in an encrypted format 
What should you include in the plan？（）