A data policy defines what level of authentication or encryption protects data as it flows through the VPN.
The communicating systems agree on these attributes during the Internet Key Exchange (IKE) protocol phase 2 negotiations. You do not need to define a data policy when you create a manual connection. In addition, if you create your VPN with the New Connection wizard, the wizard can create a data policy for you.
To define a data policy or make changes to an existing one, follow these steps: