A link is not enough, you have to register and submit a corresponding proof. Licensing will then take place within 24 hours:
To purchase an Adobe licence as a student, pupil or apprentice, you must be at least 13 years old and provide proof of eligibility. You secure the Adobe student discount by submitting a document from the educational institution with your name, the name of the institution and the current date.
Valid proofs are:
Pupil/student ID card
Certificate of enrolment
Report card
Transcript of grades
Proof of payment of school or tuition fees