Which cloud service model describes Microsoft 365?

Microsoft 365 is a prime example of Software as a Service (SaaS). In the SaaS model, the cloud provider manages all aspects of the application, including the underlying infrastructure, operating systems, and software. Users access the application over the internet, typically through a web browser or a client application, and do not manage any of the underlying infrastructure. This allows users to focus solely on using the software without worrying about maintenance or updates. Infrastructure as a Service (IaaS) provides virtualized computing resources over the internet, giving users control over operating systems, applications, and middleware, but not the underlying hardware. Platform as a Service (PaaS) offers a complete development and deployment environment in the cloud, allowing developers to build and run applications without managing the infrastructure. Community Cloud is a deployment model, not a service model, where infrastructure is shared by several organizations with common concerns.