Office 365, Microsoft's first product launched on a cloud subscription basis, is also the first Microsoft product. Because it is cloud-based, it has more to offer than any of the other products. Anybody who decides to migrate to Office 365 from the desktop requires a great deal of knowledge about plans, deployment, migrations, and other technical aspects. Many blog posts are available on theoffice.com/setup site. They provide a wealth of information. They give you all the information you need in a short time to make it easy for you to learn about any topic.

Microsoft's "Security Defaults", a feature Microsoft introduced in 2019, is the best way to start. Good news if your tenant was created after that date. In this case, you don't have to do anything. It's easy and simple to set it up if you don't have a tenant yet. Microsoft even states that security defaults can be used by organizations that want to improve their security posture, but don't know where or how to begin. The other real way to get started is to visit office.com/setup. This is more complicated than security defaults.