I have Office 356 on my SP3 which I purchased but my sister in law just bought a new SP3 and she saw cocsco is selling Office 2016 for a nice price and wondered could she just download Office 2016 from Microsoft then insert the Product Code from the retail version??? Obviously it would only be good for one device(her new SP3) but wondered if it would accept it seeing the Product Code is from the DVD Retail Version???