To automate OS and database patching in a Nutanix NDB environment, the administrator should configure a Maintenance Window. A Maintenance Window in NDB allows the administrator to schedule automated patching tasks (e.g., OS updates and database software updates) during specified time periods, minimizing disruption to production workloads. This feature integrates with software profiles and can be set to run periodically or on-demand, ensuring patches are applied efficiently and consistently across the environment.

Option A (Access Control) is incorrect because Access Control manages user permissions, not automation of patching.

Option B (Pulse) is incorrect because Pulse is a monitoring tool, not a scheduling mechanism for patching.

Option C (Maintenance Window) is correct as it provides the scheduling and automation framework for patching activities.

Option D (SMTP Server) is incorrect because SMTP is for email notifications, not patching automation.

This configuration enhances operational efficiency and reliability.

Nutanix Database Service (NDB) User Guide, Chapter 4: Managing Software Profiles, Section: Scheduling Maintenance Windows

Nutanix Certified Professional - Database Automation (NCP-DB) v6.5 Blueprint, Section 4: Manage Database Software Profiles