A Management-as-a-Service (MaaS) agent running on a SOPS creates collecting management statistics relating to the health, utilization, and performance of a subscriber on-premises system (SOPS). The MaaS agent forwards the collected data to a MaaS server, which stores the data in association with a tenant identifier (TID) in a multi-tenant database. The MaaS server tags user queries with the TID, so that the query result is based on management data for the respective SOPS, to the exclusion of SOPS associated with different TIDs. The use of multi-tenant techniques with non-multi-tenant SOPS allows one MaaS to manage plural SOPS while maintaining isolation of the management data for the respective SOPS. In addition, the use of multi-tenant techniques allows SOPS to be managed together with cloud-based subscriber applications, facilitating common management of hybrid cloud and on-premises systems.