HTTP 404 when accessing .svc file in IIS

You need to add a mapping for the SVC extension to ASP.NET. The easiest way to do this is to run ServiceModelReg.exe -i from C:\Windows\Microsoft.NET\Framework\v3.0\Windows Communication Foundation. You may also need to enable ASP.NET if you haven't already done so.

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If you are using Windows Server 2012 or 2016, follow these instructions instead:

• WCF on IIS8; *.svc handler mapping doesn't work

What worked for me, On Windows 2012 Server R2:

Thanks goes to "Aaron D"