What installation is required on an on-premises server to integrate it with Microsoft Defender for Cloud?

The correct choice is to install the Azure Defender agent on an on-premises server to integrate it with Microsoft Defender for Cloud. The Azure Defender agent is specifically designed to enable comprehensive security management and advanced threat protection for hybrid cloud workloads and on-premises resources. By deploying this agent, you can enhance your security posture, gain cloud security insights, and protect workloads that are running on your on-premises servers.

The integration of the Azure Defender agent allows for continuous monitoring and real-time alerts on potential vulnerabilities and threats, enabling the proactive mitigation of risks. This is critical for organizations that utilize both cloud and on-premises infrastructures, as it helps maintain a unified security management approach across various environments.

Other options like installing the Microsoft Defender for Endpoint agent, Microsoft 365 Defender agent, and Azure Security Center agent do not fulfill the specific requirement for integrating an on-premises server with Microsoft Defender for Cloud in the same way. While these agents provide important security functions within their respective domains, the Azure Defender agent is explicitly tailored for the cloud security needs of hybrid and on-premises environments.