If he got it through the school, he needs to talk to the school's IT department, I think.
Not having the email address will make things a little difficult, but customer support might be able to help.
This is a public forum, not Adobe support. Users, including the Community Experts, can't provide support for account, subscription, billing, download, or product activation issues. Support for those issues requires an Adobe employee.
Adobe provides support through the Chat function on the contact page, through a phone call, or through Twitter. There is no email support.
CHAT: Click the following to contact Adobe customer support staff for help:
https://helpx.adobe.com/contact/support.html
1. You must be signed in with your Adobe ID.
2. You must allow cookies in your web browser for this to work.
3. Disable any ad blocker
4. Disable any pop-up blocker for the site
5. Disable any script blockers for the site
This is the link to the US website. If you are not in the US, the site should redirect to the page appropriate to the region associated with your ID.
Click the chat icon at the bottom right of the page to open a chat session.

If that doesn't work, try this link, which opens a chat window directly:
https://helpx.adobe.com/contact.html?rghtup=autoOpen
PHONE: You can also search this page for a regionally appropriate phone number for customer support.
https://helpx.adobe.com/contact/phone.html
You can also try Twitter, @ AdobeCare. (take out the space)
Meantime, I'm going to move this to the Account, Payment, & Plan forum for you, which is the appropriate forum for your question.