I’m trying to build this add-on and have look at the help files and I see below were to locate the sample file for the HostedEmail and it no were to be found. I have download the SDK from TechNet
The Windows Server 2012 Essentials Hosted Email Framework SDK contains an extended sample that describes how to create and build a hosted email add-in provider, a log monitor, additions to the Dashboard UI, as well as a custom Windows Installer package. The sample also includes a simulated email service, which the provider links to in order to demonstrate simple email features.
I Download the package from http://www.microsoft.com/en-us/download/details.aspx?id=34860 and install the Windows Server 2012 Essentials SDK package on the development machine and was looking for this file
%ProgramFiles%\Microsoft SDKs\Windows Server 2012 Essentials\6.2\samples\HostedEmail
Can someone let me know where to acquire this sample file?