In this video, you will get a quick start guide for how to register Azure Stack, enable multi-tenancy, as well as onboard, offboard, and tag tenants to the appropriate CSP tenants. Please note, the document referenced at 9:30 has moved to https://aka.ms/AZSforCSP.
Learn more: https://azure.microsoft.com/en-us/overview/azure-stack/
Publisher: Microsoft Azure
You can watch this video also at the source.