Each user has 5 licenses that can be installed on 5 different PCs, log in using the link and if your student email is qualified, you will be able to use the software.
Appears to only work for universities who use Microsoft's services for email and skydrive.
YES - UTS*, JCU, UNSW*, UQ, UON, SWIN, FED, UWS, USYD*, UniSA, UniMelb, ACU*, Curtin Uni*, Deakin Uni LA Trobe Uni, UOW
NO - MQ, TAFE NSW-OTEN, UWA, QUT, Monash Uni
Edit: more likely to work on prep to year 12 student e-mails, but you can still try on uni e-mails.
*possibly outlook only