After having written several posts on Windows Server 2016 Essentials Technical Preview 3, it's time for Technical Preview 4!
Meanwhile, here's the information from the TechNet Evaluation Center
Windows Server Essentials, offers a flexible, affordable, and easy-to-use server solution for small businesses with up to 25 users and 50 devices. An ideal first server, Windows Server Essentials can also be used as the primary server in a multi-server environment for small businesses. Windows Server 2016 Essentials Technical Preview 4 provides a wide range of new and enhanced features and capabilities for Windows Server Essentials, allowing small businesses to be more productive.
As a reminder, these are early pre-release builds. Many of the features and scenarios are still in development. As such, these builds are not intended for production environments, labs, nor full evaluations. This is pre-released software; features and functionality may differ in the final release.
2. Register, then download and install the preview
3. Receive emails with resources to guide you through your preview
When moving from a previous version of Windows Server Essentials to Windows Server 2016 Essentials Technical Preview 4, you will need to uninstall the previous version for a clean installation of Technical Preview 4.
Upon installation, you will be prompted to activate. A product key is not required for the ISO installation.