The AZ-900 has a reputation as an easy exam, and that reputation gets candidates failed. Microsoft designed it to reward business-reasoning over technical depth — a distinction that trips up experienced IT professionals more than beginners. The shared responsibility model, service use-case scenarios, and governance tooling distinctions are where prepared candidates separate from overconfident ones. Bottom line: IT professionals with cloud experience can pass in under 10 hours of focused study; non-technical candidates should plan 4–6 weeks. The one thing most people get wrong is underestimating Domain 3.