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You could ask Microsoft; however, I had the 2016 version and when I changed computers (twice) I uninstalled it from the old computer and downloaded it to the new one. Now that I purchased the 2021 version, I uninstalled the old one and installed it on a secondary computer. It's your license and you'll continue to have access to it from your Office login.
Sorry, there was a problem. Please try again later.It appears that it tracks the unique code, cuz when I accidentally tried to install the same one on another device (I bought two licenses), it told me the one on the first device would be disabled. so I needed to use the second code.
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![Microsoft - Office Home & Student 2021 (1 Device) - Mac OS, Windows [Digital]-Front_Standard](https://pisces.bbystatic.com/prescaled/500/500/image2/BestBuy_US/images/products/6474/6474446cv15d.jpg;maxHeight=100;maxWidth=60)