Product : Microsoft Corp, Azure Stack/1903, IaaS + PaaS
Feature : Multi-Tenancy, Regulatory, Security & Compliance
Content Owner:  Bhagyashri (Shri) Bhagvat
Summary
Support for multi-tenancy is only available in connected scenarios deployed using Azure AD
Details
https://docs.microsoft.com/en-us/azure/azure-stack/azure-stack-identity-architecture