MangoApps enterprise appliance is an industry-standard OVF 1.0 virtual machine. This means it can be deployed on anything that supports the standard ( for e.g. VMware ESX).
MangoApps enterprise appliance setup can scale horizontally and vertically and easily scales to millions of users (view details). We have tested the system with 1 million simultaneous users. As part of your on-premise deployment process we will assist you in configuring the appliance for distributed, high availability setup.