Which Azure Security Center pricing tier is required to allow modification of operating system security configurations?

The Standard tier of Azure Security Center (now Microsoft Defender for Cloud) is required to enable advanced security features, including the ability to modify operating system security configurations. This tier provides enhanced threat protection, vulnerability assessments, and regulatory compliance features. The Free tier offers basic security posture management but lacks the advanced capabilities for configuration modification. There is no longer a 'Premium' tier; the 'Advanced' tier is not a current pricing model for Defender for Cloud. The Standard tier is the entry point for comprehensive cloud security posture management and workload protection.