Engaging stakeholders is the most important step when developing an information security strategy, as it ensures that the strategy is aligned with the business objectives, risks, and needs of the organization. Stakeholders include senior management, business units, IT staff, customers, regulators, and other relevant parties who have an interest or influence on the information security of the organization. By engaging stakeholders, the information security manager can gain their support, input, feedback, and buy-in for the strategy, as well as identify and prioritize the security requirements, expectations, and challenges.

References = CISM Review Manual, 27th Edition, Chapter 4, Section 4.1.1, page 2131; CISM Online Review Course, Module 4, Lesson 1, Topic 1