When trying to access my Azure account portal, I am unable to login and am receiving this error:
AADSTS50020: User account 'email@example.com' from identity provider 'live.com' does not exist in tenant 'Microsoft Services' and cannot access the application '23523755-3a2b-41ca-9315-f854902566a95'(ACOM Azure Website) 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.
How do I determine which of my accounts needs to have the failing account added as an external user?
How is an external user added?