How to obtain a voucher code for ASE 2 exam?

[Ontapforrum]

check out this page:
https://www.netapp.com/us/forms/content/virtevent-fy17q2-voucher.aspx
https://www.netapp.com/us/services-support/university/certifications/security-policy.aspx#9

I don't know if the email ID mentioned there for questions is still valid but you can try emailing to it.