Microsoft 365 Fundamentals MS-900 Practice Question

An add-on license is designed to layer extra functionality on top of an existing base subscription. By purchasing and assigning the Microsoft 365 E5 Compliance add-on (or similar) only to the 25 legal-department users, the organization unlocks Advanced eDiscovery and Insider Risk Management for those individuals without changing or replacing the Microsoft 365 E3 base licenses for everyone else.

Base licenses such as Microsoft 365 E3 provide the core suite of productivity, security, and management services but cannot be layered onto another license. A trial license is time-limited and intended only for evaluation, not for ongoing production use. Volume licensing describes a purchasing program (e.g., Enterprise Agreement) that allows organizations to buy licenses in bulk; it does not, by itself, add features to an existing user subscription.