You can find the documentation here: https://mysupport.mcafee.com/eservice/productdocuments.aspx?strPage=2
You may need username and password
What ports to be blocked and what policies to be applied depends on your organization and business requirements. There is no document which explains the policies and procedures for a particular department, business function or role.
Easy indian is right on the point.
Data classification is an integral part of DLP/Encryption and it differs from organization to organization. If you have a information or privacy team within the organization, they might help you in understanding the data protection/encryption needs of your organization.
When you use your grant number to download the product, you can also get the documentation or go to kc.mcafee.com and serach for dlp documentation.