ShowKeyPlus is a portable freeware app to retrieve and save your Windows product key if you lost it.

ShowKeyPlus will retrieve your product version or name (Windows 10 Pro, for example), the product ID, the currently installed key and the OEM key, if applicable. You can then save the information found in a text file that you can backup, print or whatever you like.

Optionally, ShowKeyPlus can also retrieve your key from backup if you have a Windows folder from the installation. It can also check that your product key is valid with your edition of Windows.

Once the file .exe file has been uploaded to KACE. The only thing that you really need to do is:

Checked box: Default installation

Additional Parameters: "c:\ProgramData\Quest\KACE\%ComputerName%.txt"

of course you can tell it save the file wherever, and name the file with whatever name. You can also change it from .txt to .csv if you want.