An example system including a controller, a processing resource, and a memory resource including instructions that when executed cause the processing resource to discover an orphan virtual machine (VM) included in a cloud platform. The controller may determine characteristics of the orphan VM based on information identified in the cloud platform and map the orphan VM to a virtual network function (VNF) based on the information identified in the cloud platform and assign the VNF to a tenant based on the characteristics of the orphan VM.