The lack of due diligence for the recommended cloud vendor should be of greatest concern to the risk practitioner, because it exposes the organization to potential risks and issues related to the security, reliability, performance, and compliance of the cloud service provider. Due diligence is a process of conducting a thorough investigation and evaluation of a potential vendor or partnerbefore entering into a contractual relationship. Due diligence helps to verify the vendor’s credentials, capabilities, reputation, and track record, and to identify any red flags or gaps that may affect the quality or suitability of the service. Cloud computing is a model of delivering IT services over the internet, where the service provider owns and manages the IT infrastructure, platforms, or applications, and the customer pays only for the resources or functions they use. Cloud computing can offer cost savings, scalability, and flexibility for the business, but it also introduces new risks and challenges, such as data privacy, security breaches, vendor lock-in, service outages, or regulatory compliance. Therefore, performing due diligence for the recommended cloud vendor is essential to ensure that the organization’s expectations and requirements are met, and that the risks and issues are identified and addressed. The business introducing new SaaS solutions without IT approval, the maintenance of IT infrastructure being outsourced to an IaaS provider, and the architecture responsibilities not being clearly defined are all possible concerns for the risk practitioner, but they are not the greatest concern, as they can bemitigated or resolved with appropriate controls, policies, or agreements. Reference = Risk and Information Systems Control Study Manual, Chapter 5, Section 5.2.1, page 183