Microsoft 365: A Prime Example of Software as a Service (SaaS)
Which of the following is an example of a SaaS (Software as a Service) offering from Microsoft?
Quick Answer
The answer is Microsoft 365, which is the correct choice because it exemplifies Software as a Service (SaaS) by delivering fully managed productivity applications like Word, Excel, and Teams over the internet. In a SaaS model, the provider handles all underlying infrastructure, operating systems, and updates, so you simply log in and use the software without managing servers or runtime environments. On the Azure Fundamentals AZ-900 exam, this concept tests your ability to distinguish between cloud service models: SaaS (ready-to-use software), PaaS (platform for development), and IaaS (virtualized infrastructure). A common trap is confusing Microsoft 365 with Azure services like virtual machines (IaaS) or SQL Database (PaaS), but remember that SaaS focuses on end-user applications you consume, not build upon. For a quick memory tip, think of “SaaS for your seat” — you pay for a seat license to use the software, not to manage the stack beneath it.
⚠ Common exam trap
It's easy for candidates to confuse PaaS (like Azure App Service or Azure SQL Database) with SaaS, because both are 'managed' services, but PaaS still requires the customer to manage application code or database schemas, whereas SaaS provides a fully finished application ready for end-user consumption.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Microsoft 365
Microsoft 365 is a SaaS offering because it provides ready-to-use productivity applications (e.g., Word, Excel, Teams) accessed via a web browser or client, with Microsoft managing the underlying infrastructure, operating system, and application updates. The customer simply consumes the software without needing to install or maintain servers or runtime environments.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Azure Virtual Machines
Why it's wrong here
Azure VMs are IaaS — customers manage the OS and applications on cloud-provided virtual servers.
- ✗
Azure App Service
Why it's wrong here
App Service is PaaS — customers deploy their applications on a managed platform.
- ✓
Microsoft 365
Why this is correct
Microsoft 365 is SaaS — Microsoft manages everything; users just access the application.
- ✗
Azure SQL Database
Why it's wrong here
Azure SQL Database is PaaS — customers manage their database data and schema on a managed platform.
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Same concept, more angles
1 more way this is tested on AZ-900
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. What is Software as a Service (SaaS)?
easy- A.A model where customers manage their own virtual machines and applications
- ✓ B.A model where the provider delivers complete software applications managed entirely by the provider
- C.A model where customers deploy their code on provider-managed platforms
- D.A model where customers rent physical hardware from the provider
Why B: Software as a Service (SaaS) is a cloud computing model where the provider hosts and manages the entire software application, including the underlying infrastructure, middleware, and data. Customers access the application over the internet (typically via a web browser or API) without needing to install, maintain, or update anything locally. This model shifts all operational responsibility to the provider, making it the most 'hands-off' cloud service model for the customer.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This AZ-900 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-900 exam.