Pre-installed Office 2016 won't activate (keeps trying to activate even after entering the correct key)

If you're working with a pre-installed Office 2016 (Microsoft Desktop Apps) and you want to activate that installation with a volume license key, you need to make some registry edits.  Very, very annoying.

This page goes over the process:
https://support.office.com/en-us/article/office-repeatedly-prompts-you-to-activate-on-a-new-pc-a9a6b05f-f6ce-4d1f-8d49-eb5007b64ba1

In essence, you delete these two keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Office\16.0\Common\OEM

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\16.0\Common\OEM


Delete the entire OEM key