goto offer page enter hotmail email and the offer code than sumbmit.
goto your hotmail accounjt and you will get a email with a link to buy, open it, BUT DONT DO ANYTHING TO IT YET
open a 2nd tab/window and goto the offer link again, but this time enter the @utoronto.ca email and other code. then submit again.
now goto your opened email with the link and you can now add MS office to the cart and pay.
note use a long complicated email with numbers as most people are already using
asdfdfa@utoronto.ca lol!