Exchange Server 2013 hosting and multi-tenancy solutions and guidance | Office TechCenter
Summary
A multi-tenant Exchange deployment is defined in this topic as one where the system has been configured to host multiple and discrete organizations or business units (the tenants) that ordinarily don’t share e-mail, data, users, global address lists (GALs), or any other commonly used Exchange objects. In Exchange 2010 Service Pack 1 (SP1), Exchange introduced the ability to install in a hosting mode by using the switch when running the installation script. To learn more, see the Exchange Team Blog article Future of /Hosting Mode. This paper doesn’t provide step-by-step instructions about how to achieve multi-tenancy with Exchange 2010 SP2. Instead, it provides information about the challenges and problems that must be solved, and offers advice and direction to ensure the Exchange environment you build can be supported by Microsoft.