My apologies, I have been on other projects and never returned to this topic. I know this is a very late reply, but the answer is no. I did not put the product key in the deploy wizard. That said, I have had the best success when the newly imaged computer is started for the first time with an active LAN connection (ethernet) rather than WiFi. My total deployments now are around 64, including re-imaging a few machines after employee turnover. I still have not had a single one fail to activate.
I'm sure you know this already, but just in case... you cannot upgrade an OS (say from Windows 7 to Windows 10) and have it activate. Windows 10 must be OEM.