Hold on: Don’t deploy Exchange 2016 CU3 on Windows 2016 for now
Exchange 2016 CU3 released back in Sept 2016, which gave us ability (in supported way) to install Exchange 2016 on Windows Server 2016. Recently various reports to Microsoft Support Channel that it’s having problem with IIS host process and W3WP.exe is crashing more often.
Microsoft Windows engineering team has acknowledged this in their release notes:
“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.”
So until further notice and Microsoft Windows team fix the backend issue (which could be sooner as their priority is to have stable environment for their customers) don’t deploy it on Windows Servers 2016, rather deploy it on Windows Server 2012 R2 as it’s supported for years now.