Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi, @LSH
This is a common trap with Office Home & Business 2024, so you're not alone.
Short version: a one-time purchase like this can't be deactivated or unlinked from a device in your Microsoft account, there's simply no button for it. The device record only gets replaced when you install and activate again on the correct PC.
So on each of the other computers, install Office from account.microsoft.com/services with the same account, open Word and sign in. With several licenses on one account you should see a "Select Office for this device" list, pick one that's not in use. If Office is already there, use File > Account > Change License instead.
If it says the activation limit is reached, choose "I want to activate by telephone." That's the official way to move a one-time license and it overrides the block.
If some still fail, contact Microsoft Support and ask them to delink those licenses.
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Don't redeem the keys again. Hope this helps.