So I ended up figuring out that the product key that came in the box that was shipped from SHI only worked to access the Microsoft website and there is a different product key under my account on Microsoft's website that must be entered on the computer that has Office installed. Thanks for your guidance and help. Step 2: Launch iSumsoft Product Key Finder, and then click on the “ Start Recovery ” button. The program will scan your computer and find the product keys of supported programs, including Microsoft Office and other programs. Step 3: Click the “ Save to File ” button to back up all product keys to a text file, so when you need to I purchased Office Home & Business 2019 from the Microsoft website. Today is the FIRST TIME I have attempted to download and install this product. While logged into my Microsoft account, and attempting to install this product, a message reads "This product key has already been used. Install from your Microsoft account". Microsoft Office 2019 Professional Plus product key ($55/key). It has Word 2019, Excel 2019, PowerPoint 2019, Access 2019, Outlook 2019. It has Word 2019, Excel 2019, PowerPoint 2019, Access 2019, Outlook 2019. Normally, for the perpetual licenses, I mean, one-time purchase Office Home & Business, Office Home & Student or the Office Professional can only be installed on a single computer at a time. So, If you says you lost the key, you must have a but have a valid proof of purchase, Microsoft support may be able to replace your product key or provide Activate Office. Office (retired - do not use) Select your version of Office below to learn how to activate Office: Activate Office 365, 2019, 2016, or 2013. Activate Office that's pre-installed on a new Windows 10 device. Activate an Office purchase or offer that's included on a new Windows 10 device. Activate Office from Workplace Discount .

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