Effective integration of Cloud software services to existing in-house applications is an important element of leveraging the Cloud. It is not sufficient to be content with procuring software as a service and deploying the product. A solid integration strategy and plan can support the connections and seamless transfer of data across on-premise and external services. Cloud integration has to take into account factors such as elasticity and scalability and the architecture has to be clearly defined to support these integration aspects. If integration is not done right, silos can develop and data redundancy can quickly creep in. The key is to build an integration framework or layer that supports Cloud services and on premise applications, services, databases in the organization.