Microsoft 365 Certified: Fundamentals (MS-900)

Certification

Entry-level Microsoft 365 fundamentals exam. Retired on 31 March 2026; Microsoft plans no direct replacement (see AB-900 for Copilot and agent administration).

No longer current.

Related topics in brief

• Microsoft · Developed by · Organization
  Microsoft Corporation is a technology company that develops software and cloud services such as Microsoft 365, Azure and Dynamics 365.
• Microsoft 365 · Covers · Platform
  Microsoft 365 is a subscription bundle of productivity apps and cloud services, including Word, Excel, Outlook, Teams, SharePoint and OneDrive.
• Microsoft Teams · Covers · Product
  Microsoft's collaboration hub for chat, meetings, calls and apps. It is also a main surface for Copilot and for agents built in Copilot Studio.
• SharePoint · Covers · Product
  Microsoft 365's platform for intranets, document libraries and team sites. Most files shared in Teams are stored in SharePoint, so its permissions directly decide what Copilot can find.
• Exchange Online · Covers · Product
  The cloud email, calendar and contacts service in Microsoft 365. Outlook connects to it, and mail flow rules, anti-phishing and retention policies are managed around it.
• Microsoft Word · Covers · Product
  Word processor of Microsoft 365 for writing, formatting and reviewing documents, with co-authoring, comments, tracked changes and Copilot support.
• Microsoft Excel · Covers · Product
  Spreadsheet application of Microsoft 365 for calculations, tables, charts and data analysis, with Power Query, PivotTables, dynamic arrays and Copilot.
• Microsoft Outlook · Covers · Product
  Email, calendar, contacts and tasks client of Microsoft 365 that connects to Exchange Online and other mail accounts.
• Microsoft Certified: Copilot and Agent Administration Fundamentals (AB-900) · Similar to · Certification
  New fundamentals certification (2026) on administering Microsoft 365 Copilot and agents.