No, not everyone needs a Microsoft 365 Business Premium subscription, although the security and management benefits are available only to those users with devices managed with a Microsoft 365 Business Premium subscription.

Standardizing an IT environment serves to help reduce maintenance and security costs over time and is a state that businesses should strive to attain. However, some small and medium-sized customers update their software primarily when they upgrade their hardware, over an extended period. These businesses can deploy Microsoft 365 Business Premium to part of their organization, but for best protection of sensitive business data and consistent collaboration experiences, deployment to all users is recommended.