If Office was already installed and you need the key for a reinstall, it is likely stored in your Microsoft account.
Beware of "cheap keys" sold on third-party marketplaces for prices that are too good to be true. These are often volume license keys meant for businesses, not individuals. They may work for a while, but Microsoft can deactivate them at any time, leaving you without software and out of cash. microsoft office product key
⚠️ Microsoft no longer includes product keys in most new Office 2021/365 retail packages — instead, the key is linked to your Microsoft account. If Office was already installed and you need
To ensure you can always access your Microsoft Office product key: microsoft office product key