The CMB should include representations from all of the following offices except:

The Cloud Management Board (CMB) is a vital component in overseeing and managing cloud security within an organization. Its structure is designed to include stakeholders who can contribute diverse perspectives and expertise necessary for making informed decisions about cloud security policies, compliance, and risk management.

In the context of this question, the inclusion of representations from management, the security office, and the IT department reflects a comprehensive approach to cloud governance. Management provides strategic direction, the security office ensures adherence to security protocols and best practices, and the IT department brings technical expertise regarding cloud infrastructure and capabilities.

On the other hand, while regulators play an essential role in defining compliance requirements and industry standards, they are typically not part of the internal governance board like the CMB. Instead, their influence is generally felt through regulatory requirements rather than direct participation in organizational management or decision-making bodies. Therefore, including regulators as regular members of the CMB is not standard practice, as the board's focus is on internal operations and strategic initiatives rather than external compliance oversight. This explains why the correct answer points to regulators as the group that should not be included in the CMB.