Answer i got on Practice exams : Microsoft Defender for Identity (formerly Azure Advanced Threat Protection) is a cloud-based security solution that leverages your on-premises Active Directory signals to identify, detect, and investigate advanced threats, compromised identities, and malicious insider actions directed at your organization. Microsoft routinely changes the names of their services, including this one. This is something to be aware both on the exam, where you may encounter the new or old names, and also in the real-world.
Yes, you are absolutely right. And we are often caught out, having just made a course or update, and then the name is changed.