When an organization allows managers to use their own smartphones at work under a Bring Your Own Device (BYOD) policy, IT security and risk management become critical. The most important policy and procedure to include would be documenting the process for discontinuing use of the devices to ensure data security, compliance, and risk mitigation when employees leave the company or change roles.

Data Security & Compliance: Ensuring that sensitive company data is removed securely when an employee leaves or replaces a device is crucial to prevent unauthorized access.

Access Control & Endpoint Management: The IT department needs a clear policy to revoke access to corporate applications and networks when a device is no longer in use.

Risk Mitigation: Unauthorized access to company systems through lost, stolen, or retired devices can lead to security breaches.

Option B (Required removal of personal pictures and contacts): Personal data does not impact company security and is irrelevant to corporate IT policies.

Option C (Required documentation of expiration of contract with service provider): This is the employee's responsibility, not the organization's, and does not address security risks.

Option D (Required sign-off on conflict of interest statement): While conflict of interest policies are important, they are unrelated to IT security concerns related to BYOD.

IIA’s GTAG (Global Technology Audit Guide) on Managing and Auditing IT Vulnerabilities emphasizes the importance of BYOD risk management, including clear procedures for device decommissioning.

IIA's Business Knowledge for Internal Auditing (CIA Exam Syllabus - Part 3) highlights IT governance frameworks that require policies for data access and security when using personal devices.

Why Option A is Correct:Why Other Options Are Incorrect:IIA References:Thus, the most appropriate answer is A. Required documentation of process for discontinuing use of the devices.