System Center Service Provider Foundation 2012 R2 is part of the System Center suite, available in System Center 2012 R2 Orchestrator installation media. SPF add multi-tenancy capabilities to System Center products such as SCVMM, SMA and more. SPF exposes an extensible OData Web Service that interacts with Virtual Machine Manager.
Service providers and organization can design and develop their own cloud portals, and take advantage of SPF for utilizing IaaS capabilities of SCVMM. Windows Azure Pack uses SPF to integrate with SCVMM for provisioning and managing cloud IaaS resources such as virtual machines, virtual networks and so on.