A:AnswerNo, you cannot upgrade if your subscription is managed by Best Buy. The instructions provided in the other answer simply send you in a circle between your Microsoft account and your Best Buy account
A:AnswerAfter I paid for the Office 365 subscription, I received an email from Best Buy with the product key included in the text of the email (scroll down to find it). The subject line of the email was this:
"How to install your new Microsoft Office 365 software"
A:AnswerI had to call and cancel (1-800-433-5778), but it was relatively straight forward, even though I had next to no info (given it was several years since I signed up).
