Hi Leon,
Thank you for this helpful reply.
Yes, We already have SAML2 but we have two kind of student:
1. Student that is in or organization.
2. and Student that is not.
We don't need to give an account for the external student in our internal system.
We just want them to access the moodle site.
We will work on your suggestion and I'll let you know for the result.
Best regards,
Arnel Rubiano