My usual disclaimer: I'm not an expert at anything.
Here's what I've been able to find. Apparently, e-academy's License Management System (ELMS) is a part of the MSDN Academic Alliance.
Microsoft ELMS - Techrights
According to MSDNAA, all MSDNAA Memberships include exactly the same perpetual license — it never
expires (even after students graduate!), as long as the usage guidelines are followed. (See item 6 in left column for student, faculty and administrator information.)
MSDNAA: Get Started: Step 2: Choose the subscription that's right for your department