Thanks for taking the time to respond.
I'm not sure if you understood my question - I sure didn’t understand the response. I wasn't asking about anything to do with Windows 2008 R2.
My question is specific to Windows 2012 and later.
This blog post states that “Since Exchange Server 2013, the Windows feature Media Foundation has appeared as a pre-requisite in our setup checks on Windows Server 2012 and later”
If you look at the Exchange prereqs for Windows 2012 on this page https://technet.microsoft.com/en-us/library/bb691354(v=exchg.150)#Anchor_2 , the Install-WindowsFeature command doesn't include "Server-Media-Foundation" and never has afaik. Why not? Doesn't make sense to me if this is a pre-requisite.
Install-WindowsFeature AS-HTTP-Activation, Desktop-Experience, NET-Framework-45-Features, RPC-over-HTTP-proxy, RSAT-Clustering, RSAT-Clustering-CmdInterface, RSAT-Clustering-Mgmt, RSAT-Clustering-PowerShell, Web-Mgmt-Console, WAS-Process-Model, Web-Asp-Net45, Web-Basic-Auth, Web-Client-Auth, Web-Digest-Auth, Web-Dir-Browsing, Web-Dyn-Compression, Web-Http-Errors, Web-Http-Logging, Web-Http-Redirect, Web-Http-Tracing, Web-ISAPI-Ext, Web-ISAPI-Filter, Web-Lgcy-Mgmt-Console, Web-Metabase, Web-Mgmt-Console, Web-Mgmt-Service, Web-Net-Ext45, Web-Request-Monitor, Web-Server, Web-Stat-Compression, Web-Static-Content, Web-Windows-Auth, Web-WMI, Windows-Identity-Foundation, RSAT-ADDS