Just to confirm that it works with existing 365 users. I installed my old 2010 license on a old MacBook and I used to Get Office app to get a promo code for 50% off, I selected a Home 1 YR 99$ plan and the promo code gave me 49.99 as a price. I extended 365 until Jan of 2018...
WooT!!
You get a month for enabling auto renew as well.
Double WooT!!
WooT!!
You get a month for enabling auto renew as well.
Double WooT!!