While Internet search sweeps the Web, enterprise search focuses on the information that is most relevant to a company's customers, employees, and partners. Whether it's proprietary information that a company owns, public information that a company shares externally, or information gathered from partners or the Web, enterprise search can unify it into an experience that empowers a company's customers, employees, and partners to take action and drive business outcomes.
A great place to get help with Enterprise Search: social.technet.microsoft.com/.../enterprisesearch .