Since inception of MongoDB as a NoSQL database system, roughly half of deployments have been on commercial cloud, providing Infrastructure as a Service. Business users have realized benefit of instant, elastic procurement of servers and offloading costs from traditional data center architecture. The next phase of cloud service architecture is Database as a Service, which has been accelerating dramatically the last year among large enterprise customers of MongoDB. We will explore integration with varying enterprise cloud architectural requirements, MongoDB best practices as applied to fundamental architectural choices, and collaboration with the business owners to ensure a good match of needs and value. We will also address accounting, chargeback integration, and quanification of benefits to the enterprise, such as standardizing elastic architecture and offloading database system maintenance costs.