Microsoft Defender for Servers integrates directly with Qualys vulnerability assessment tools, enabling the identification of missing updates and insecure configurations across both Windows Server and Linux virtual machines in your Azure subscription.

It provides:

Built-in vulnerability scanning using Qualys Vulnerability Assessment engine (without requiring separate Qualys licenses).
Continuous monitoring and reporting for misconfigurations, missing patches, and security vulnerabilities.
Integration with Azure Security Center and Microsoft Defender for Cloud dashboards.
Why Not the Other Options?
a. Microsoft Defender Threat Intelligence (Defender TI): ❌

Defender TI focuses on external threat intelligence to detect and analyze external threats and attack patterns, not on internal vulnerability assessments for VMs.
C. Microsoft Defender for Endpoint: ❌

Defender for Endpoint primarily focuses on endpoint protection, threat detection, and response for devices, not on vulnerability scanning for server virtual machines.
D. Microsoft Defender External Attack Surface Management (Defender EASM): ❌

Defender EASM focuses on discovering and managing the external attack surface, such as exposed assets on the internet, rather than performing internal VM vulnerability assessments....