Your organization is planning to migrate to a multi-cloud environment and requires a comprehensive identity and access management (IAM) solution that supports access to various cloud services (SaaS, PaaS, and IaaS), as well as hybrid and on-premises resources. The solution must ensure seamless user experience, minimize disruptions during migration, and comply with industry standards for security and privacy. Considering cost, scalability, and the need to leverage existing investments in IAM systems, which of the following steps is the MOST effective in designing an IAM solution that meets these requirements? (Choose one)