According to this page it only is supported up to 2012 R2, so either it is not officially supported on Windows 2016 Server or they need to update that. Hopefully someone can confirm either way but based on that I would say it is not officially certified:
Also will add that I got some feedback that there aren't any problems expected (are there ever?) with 2016 server but all of the tests have not been completed yet so it is not officially supported yet.
Yes, you are correct that the inline docs in the tenant still show up to Server 2012. I was going by the documentation published on the support site. In my test environments 2016 work just fine.