Microsoft has renamed its Windows Defender Advanced Thread Protection (ATP) solution to Microsoft Defender ATP. This step is accompanied by the fact that Microsoft Defender ATP is also available for macOS (still as preview).
The announcement was made in the tech community in this article. Microsoft Defender ATP is a solution for enterprise environments to protect against cyber threats.
The new Microsoft Defender ATP client can be installed on devices with macOS Mojave, macOS High Sierra or macOS Sierra that you want to manage and protect. Microsoft Defender ATP customers can apply for the preview. Microsoft notifies customers by email when they are added to the preview program. More details can be found in this article.