Please check :
Wishing you all a Happy 2017.
Please read this article from the Exchange Team Blog to get more details on IIS issues when deploying Exchange Server 2016 on Windows Server 2016 :
More details on the Windows Server release notes :
Release Notes – Important Issues in Windows Server 2016
If you attempt to run Microsoft Exchange 2016 CU3 on Windows Server 2016, you will experience errors in the IIS host process W3WP.exe. There is no workaround at this time. You should postpone deployment of Exchange 2016 CU3 on Windows Server 2016 until a supported fix is available.
Hope this helps !