When you join the University you will receive a Nexus365 email account. Included with this is a Microsoft login attached to your SSO plus many of the applications available with Office365 ProPlus.
Information about all the features in Nexus365 and how to download the associated Microsoft apps are found on at Nexus365. The licence allows Office365 to be downloaded onto 5 different devices, including home devices such as tablets or phones.
If you still want to purchase Office365 Pro Plus then go to OnTheHub