Microsoft has added Windows 7 SP1 and 8.1 support to their Windows Defender ATP cloud-based threat intelligence service. The service allows administrators to monitor, analyze, and respond to threats seen across a network. It works by configuring Windows workstation endpoints that send behavioral, network, and file access information to the service. SentinelOne, Bitdefender, Lookout, and Ziften have also been added to the program. This will allow administrators to offer better security to Windows 7 workstations that are supported until 2020.
Source: https://www.bleepingcomputer.com/news/microsoft/windows-defender-atp-getting-windows-7-sp1-and-8-1-endpoint-agents-this-summer/