Hi @v-xiaotang ,
Thank you, but unfortunately, your link is not relevant to the question asked.
We have an Azure tenancy and a M 365 tenancy; they both appear to use the same AAD. We use the same logins (eg username@domain )to login to both Azure portal and Power BI portal. On Azure; AAD = tenancy, therefore, even if have to seeming tenancies, one for Azure and one for Power BI service, they have to be one and the same tenancy.
My question is; whether these two "tenancies" are merged behind the scene (since they share the same AAD) and whether authentication between these two tenancies is simplified?