

If you installed Office 2013/2016/2019 from other source which included product key - in most cases product key will not be stored in the system at all.

Instead, the Microsoft account you used during the first Office installation will be linked to the product and will be needed if you need to reinstall.

If you have a Microsoft account, try this. identify which machine installed which office product key I tried to retrieve. In 2017 he had to re-install it and the following recommendation worked for him. You can find the product key via a key finder tool and use it to install Microsoft Office 2013 in another device. Microsoft Office 2013 Activation Key OFFICE 2013 PRO PLUS MSDN RETAIL. I had used my Microsoft account to purchase it through the store. I installed Microsoft Office Home & Business 2013 in 2015 on a laptop I gave my son.
