This article applies to Office Home & Business, Office Professional, and individually purchased Office apps.
If you bought multiple copies of Office and used the same Install button to install Office on multiple PCs, activation fails on the other PCs. This happens because each Install button is associated with a unique product key that can only be installed on one PC. To fix this, you can change the product key for the other PCs where you installed Office.
Select your Office version below.
Windows 10 and Windows 8.1 | Windows 7 |
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