Which cloud model would BEST meet an organization's need to move from an on-premises email solution to a cloud-based one?

The option that best meets the organization's needs for transitioning from an on-premises email solution to a cloud-based system is Software as a Service (SaaS). SaaS provides applications over the internet, allowing users to access software without the need for installation, maintenance, or management of underlying infrastructure. This is particularly beneficial for an email solution, as it offers a complete email management platform that users can access through web interfaces or apps, simplifying the transition from an on-premises setup.

SaaS solutions often include features such as automatic updates, scalability, and availability, which are essential for modern email services. They enable organizations to focus on utilizing the service rather than worrying about server management, security patches, and data storage, which are typically handled by the SaaS provider. This makes SaaS a convenient and effective choice for organizations seeking to deploy cloud-based email systems quickly and efficiently.