Still no mention of Server 2016 in requirements/release notes despite 6.5.2 now being available. We really need some input from Splunk on this question please.
Here is the Splunk Doc about system requirements. Windows Server 2016 isn't on it yet.
At the bottom of the doc, though, you can provide comments and they might get back to you about when 2016 will be available.
this UF download page, does not list Windows Server 2016 yet.
for 32-bit - Windows 8, 8.1, and 10
for 64-bit - Windows 8, 8.1, and 10 Windows Server 2008 R2, 2012, and 2012 R2
maybe, just try to install it.. it may install without any issues.
As said on other posts here, some not supported windows OS are getting installed fine
as per the UF downloads page, its currently not supported.
also the wiki says
windows server 2016 became generally available on October 12, 2016, that is just less than a month back !