My Microsoft Office 365 is working so well. I purchased MS office key from third party website. It also installing MS regular updates. When i talked to owner of key website, he also surprised to see, how my ms office key is valid for permanent activated. As per their website, they said only 1 year, I confirmed with ms cmd and microsoft, this is geniue key with permanently activated with 50 GB storage.
I purchased at INR 279.