Any update on this?? Im facing similar error when log in into Azure portal
"errorMessage": "AADSTS16000: User account '{EmailHidden}' from identity provider 'live.com' does not exist in tenant 'Microsoft Services' and cannot access the application 'xxxxxx'(Azure Portal) in that tenant. The account needs to be added as an external user in the tenant first. Sign out and sign in again with a different Azure Active Directory user account.,