A Mendix platform account is identified by the email address that was used during signup.
With BYOIDP the same principle applies; the nuance is that the account is identified by a claim that is returned from the IDP during the SSO process - typically that would be a claim/attribute containing an email address of the user.
Can you elaborate on 'two or more accounts different accounts'?
thank you for the reply.
Company A, control center, dev portal SSO.
Company B, control center, dev portal SSO.
user from companyB wants to log in into companyA apps/dev portal.