With the Services Provider License Agreement (SPLA), an organization can license Microsoft licensed products on a monthly subscription basis, during a three-year agreement term, and use these products to provide software services and hosted applications to its customers.

Open License program (OLP) is a good volume licensing option if you are a corporate, academic, charitable, or government organization that wants to pay as you go. Because you pay for licenses as you need them, you get maximum flexibility to grow with your organization's increasing and changing business needs.

A specialized licensing program with specific eligibility requirements for Independent Software Vendors (ISVs) who use Microsoft software products along with their own proprietary software to provide a unified solution to their end users.