You deploy a mobile messaging solution by using front-end and back-end servers that run Microsoft Exchange Server 2003 Service Pack 2. Certificates are installed on all Microsoft Windows Mobilebased devices.  
You need to allow devices that run Microsoft Windows Mobile 5.0 to perform certificate-based authentication for Microsoft Exchange ActiveSync.  
What should you do？（）

You deploy mobile devices that run Microsoft Windows Mobile 5.0.  
Company security policy requires an authentication process that is stronger than a user name and password combination.  
You need to ensure that Microsoft ActiveSync sessions use an authentication process that meets the company security policy.  
What should you do？（）