Office 365 for home
If you have an Office 365 subscription, you can deactivate an Office install you're no longer using so you can install Office on a different device. This is different from uninstalling Office, which doesn't deactivate the install. This is also different from canceling your Office 365 subscription. Here's how to deactivate an Office install for Office 365 Home, Personal, or University.
Go to www.office.com/myaccount and sign in using your Microsoft account, if prompted
Under Install information, locate the computer where you want to deactivate the install
Select Deactivate Install to deactivate the Office installs that you no longer use
If you don’t see Deactivate Install, it’s because you have a one-time (non-subscription) purchase of Office that can’t be deactivated using this method
Office 365 for Business
Here’s how to deactivate an Office install for Office 365 for business.
Go to www.portal.office.com/account and sign in using your work or school account, if prompted
From the Install status tile, select Manage installs
Under Install status, select Deactivate to deactivate the Office installs you no longer use