
1 - Download AzureStack-Tools
2 - Import the Download module
3 - Configure the contoso.onmicrosoft.com Azure AD tenant to allow sign-ins from fabrikam.onmicrosoft.com
4 - From the fabrikam.onmicrosoft.com Azure AD tenant, register the Azure Stack Hub directory Reference:
https://docs.microsoft.com/en-us/azure-stack/operator/azure-stack-enable-multitenancy?view=azs-2008