Windows Defender Advanced Threat Protection (ATP) * (Post breach) now also supports macOS, Linux, iOS and Android devices.
For details:
Microsoft partners extend Windows Defender ATP across platforms
https://blogs.windows.com/business/2017/11/08/microsoft-partners-extend-windows-defender-atp-across-platforms/#fkArlTUBziOplC1V.97
Yong
More information:
*a part of the Windows Defender Suite and not to be confused with Windows Defender Antivirus.
What makes a part of the Windows Defender Suite?
Pre-breach
Windows Defender System Guard
Windows Defender Antivirus (SCEP and Security Essentials replacement)
Windows Defender SmartScreen
Windows Defender Exploit Guard (EMET replacement)
Windows Defender Application Guard
Windows Defender Application Control
Post-breach
Windows Defender Advanced Threat Protection