Microsoft 365 Certified: Fundamentals (MS-900)

Microsoft · Retired March 31, 2026

Microsoft retired Microsoft 365 Fundamentals and its exam, MS-900, on March 31, 2026, without naming an official replacement. The closest current fundamentals-level credential is Microsoft 365 Copilot and Agent Administration Fundamentals (exam AB-900), which covers Microsoft 365 administration with a focus on Copilot and agents.

Take this insteadMicrosoft 365 Certified: Copilot and Agent Administration Fundamentals (AB-900)Entry point to Microsoft 365 Copilot and agent administration. No experience needed, and it never expires.See AB-900 →

If you already hold it

Fundamentals certifications do not expire, so an MS-900 you already earned stays on your Microsoft Learn transcript.

Sources: Microsoft Learn: MS-900 study guide · Microsoft Q&A: MS-900 replacement