Activating Microsoft 365 Apps for Business with a product key
Mar 31, 2022 · Use your Microsoft account, not your product key, to install and activate Microsoft 365 and individually purchased Microsoft 365 Apps, such as Project, Visio, Word, Excel, or Outlook. For more information, see Office is prompting me for a product key. If your purchase of Office came with a product key, see Where to enter your Office product key.
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