Which of the following is NOT a function of Security Information and Event Management (SIEM)?

Security Information and Event Management (SIEM) systems play a crucial role in the collection, analysis, and management of security data from across an organization's IT environment. They are primarily designed to provide real-time monitoring of security events, reporting on security incidents, aiding in compliance reporting, and collecting data that can highlight vulnerabilities.

The correct answer indicates that integrating with cloud services for authentication is not a primary function of SIEM systems. While SIEM tools can certainly ingest logs and data from cloud services, their main focus is not on performing authentication functions themselves but rather on analyzing event data and generating alerts based on security incidents.

Real-time monitoring of security events is a fundamental capability of SIEM, enabling organizations to detect and respond to threats as they arise. Reporting on system vulnerabilities aligns with the function of helping organizations manage their security posture, while aiding in compliance reporting is also a critical aspect of SIEM, as these systems help organizations meet regulatory requirements by providing the necessary logs and reports.

In summary, while a SIEM might work alongside cloud services for data analysis, the specific function of directly integrating with cloud services for authentication is outside the core capabilities typically associated with SIEM systems.