The best way to reduce the risk of terminated employees' accounts not being disabled is to automate the process by integrating Active Directory (AD) with the human resources information system (HRIS). By automating this integration, when an employee's termination date is updated in the HRIS, the corresponding account in AD is automatically disabled, reducing the risk of accounts being left active after an employee leaves the organization. CASP+ highlights the importance of automating security processes, especially for user access management, to minimize human error and ensure timely action. References: * CASP+ CAS-004 Exam Objectives: Domain 2.0 - Enterprise Security Operations (Automation of User Access Management) * CompTIA CASP+ Study Guide: Integration of HR Systems and Active Directory for Account Management