I'm getting a weird error: AADSTS50020: User account 'me@captnemo.in' from external identity provider 'live.com' is not supported for application 'caf83767

I'm getting a weird error: AADSTS50020: User account 'me@captnemo.in' from external identity provider 'live.com' is not supported for application 'caf83767-0da8-454f-ae8d-77f63deaf359'. The account needs to be added as an external user in the tenant. Please sign out and sign in again with an Azure Active Directory user account. I'm guessing only proper microsoft accounts are allowed? (@outlook.com, @live.com etc). I understand it might not be live yet, but I don't get the "unavailable yet" error.