MS-900 Exam Retired: Your Complete Guide to the New AB-900 Certification

The Microsoft MS-900 exam was retired on March 31, 2026. Find out what this means for your existing certification and learn about the new successor exam, AB-900 Microsoft 365 Copilot and Agent Administration Fundamentals. This guide covers the key differences, the ~25% content overlap, and a clear study path for 2026. Your MS-900 certification is permanent and still valuable! Learn why and see how to pivot your studies to the new AI-focused AB-900 exam. We break down the new domains, including Purview DSPM for AI, Copilot administration, and advanced governance. Start your free practice at Open Exam Prep: https://open-exam-prep.com/blog/microsoft-365-fundamentals-ms-900-exam-guide-2026 ⏱️ Timestamps: 0:00 - Introduction 0:06 - Scene 1 0:40 - Scene 2 1:16 - Scene 3 1:47 - Scene 4 2:20 - Scene 5 2:55 - Scene 6 3:31 - Next steps Recommended study resources: Disclosure: As an Amazon Associate, Open Exam Prep earns from qualifying purchases. We may earn a commission if you buy through these links. - MS-900: Microsoft 365 Fundamentals Study Guide with Practice Questions & Labs: 4th Edition - 2025: https://www.amazon.com/dp/B0FLJHWH2F?tag=openexamprep-20 - Exam Ref SC-900 Microsoft Security, Compliance, and Identity Fundamentals: https://www.amazon.com/dp/0138363730?tag=openexamprep-20 - Microsoft 365 Certified Fundamentals MS-900 Exam Guide: Gain the knowledge and problem-solving skills needed to pass the MS-900 exam on your first attempt: https://www.amazon.com/dp/B0C3R8GJZG?tag=openexamprep-20