The European Student Identifier (ESI) format has been released in the blueprint architecture document. The European Student Identifier is based on the student identifiers that you are already using for your students in your HEI. You need to contact the department(s) responsible for the student account and the internal transfer desks at your HEI and inform them about the need to use ESI in the Information System(s) of your HEI. By exposing the European Student Identifier as an attribute in the eduGAIN federation. Students will then be able to share their European Student Identifier with online services they are authenticating on.