Michael, No, the Product Key used to setup Office is really a Redemption Key. It is also acts as proof of purchase. When you setup Office with a Product Key Microsoft associates it with the Microsoft Account used with the Product Key so in effect the Product Key is transferred to the Office Account which can be accessed by signing in with the まずは、PCにインストールされている Officeのプロダクトキーを管理しているアカウント（ユーザーID）を確認 します。. エクセル、ワード、パワーポイントのいずれかを起動し、『ファイル』タブ→『アカウント』をクリック。. マウスではなくアクセスキー The same product key works for many Office 2019 installs within the company. At some stage the organization or Microsoft realizes the product key has ‘leaked’. I guess that applies to the Microsoft Office LTSC Professional Plus 2021 product that they're selling. If your Office product key doesn’t work, or has stopped working, you should contact the seller and request a refund. If you bought a product key separate from the software, it’s very possible the product key was stolen or otherwise fraudulently obtained, and subsequently blocked for use. Unfortunately, there are many dishonest sellers who Hello,We are facing issue with forgotten password for activating the Office 2019 product. We have the mail adress, but the pass is faulty, and we cannot recover it.Can you help us reactivating the MS Office Professional Plus 2019 License for Windows (1 User, Lifetime Validity) Email delivery in 2 Hours- no CD. 5.0 out of 5 stars 3 ( Activation Key Card) To find your MS Office product key for the 2019 edition, simply look in your confirmation email for a 25-digit number. Keep this number handy for any downloading and installation. Get genuine Office products published by Microsoft, properly licensed, and have genuine activation keys. There is no longer a deactivate option, when you get a new PC, you simply go to that page on Office.com or the Services and Subscriptions page on your Microsoft Account, and install Office on the new PC, the old PC will deactivate automatically once Office is installed on the new PC . . . If you encounter any activation errors on the new PC iswlK3.