Implementing an email containerization solution on personal devices is the best recommendation for an IS auditor, because it allows the organization to separate and secure the email data from the rest of the device data. Email containerization creates a virtual environment that encrypts and isolates the email data, preventing unauthorized access, leakage, or loss of sensitive information12. Requiring passwords or antivirus protection on personal devices may not be sufficient or enforceable, while prohibiting employees from storing company email on personal devices may not be feasible or practical. References: 1: CISA Review Manual (Digital Version), Chapter 5, Section 5.4.3 2: CISA Online Review Course, Module 5, Lesson 4