According to this MSI FAQ there are some additional features for Azure MSI available only in private preview. Under this link to form there's only title "Managed Service Identity - User Assigned Identity"
Does anyone know what are the features? I cannot find anything in docs.
Please note that User Assigned Identity assignments are only available for VM and VMSS as mentioned in Known issues with User Assigned Identities.
Azure Virtual Machines, Azure App Service, Azure Functions, Azure Data Factory V2 supports System Assigned Managed Service Identity. Reference Document.
Also note that for now Managed Service Identity (MSI) is a public preview feature of Azure Active Directory.
