Click “Enter the Fulfilment Centre"
Click “Office 365 ProPlus” which is free to university staff
Do “add to cart” and check out etc. You'll be asked some short survey questions at this point
The process will give you the option to create a Microsoft cloud account with a username in the form email@example.com
You'll get a temporary password which you'll be forced to change the first time you log in
This account will then allow you a login to MS cloud goodies like onenote, onedrive, office365 etc.
The one gotcha to be aware of is that the account expires after 365 days but on going through the purchasing process again promply after the expiry date, system is intelligent enough to pick up previous settings & stored files and carry on where it left off.