Great question. I was under the impression Azure AD either necessitates an org account in the tenant OR some kind of third-party provider.
In my scenario, I will potentially have a ton of external users that authenticate in a third-party proprietary platform that, to my knowledge, is not supported directly by Portals.
As such, I’d like to let end users sign in with the accounts they’d use in the third-party system, giving the impression of an SSO experience. I want to then dynamically provision these logins with an Azure AD account via Power Automate when the user enters a certain code in my canvas app. In effect, I’m wanting to let end users control their accounts and pass that to my canvas app without their being inconvenienced by my having to provide separate accounts to each one.