AB-900 case studies
AB-900 · Put your knowledge to work in context.
Microsoft 365 Certified: Copilot and Agent Administration Fundamentals - commonly referenced by its exam code, AB-900 - is a beginner-level Microsoft Certification that demonstrates your ability to support, secure, and protect an AI-enabled Microsoft 365 environment. It sits at the Administrator role level with an artificial intelligence subject focus, so it suits IT administrators, service desk staff, and early-career cloud professionals who already touch Microsoft 365 day to day and now need to extend that work to Copilot and agents. The AB-900 case studies are 5 cases and about 3,827 words.
1Rebuilding a Shared Team Inbox Without Buying Licences
Contoso (4,200 users, Microsoft 365 E3) merged two field-operations teams. IT built the new team inbox by creating a distribution list named [email protected] and a separate user mailbox [email protected], then granting 60 people Full Access and Send As through a PowerShell loop.
773 words, about 4 min2Auto-Applying a Contract Retention Label on an E3 Estate
Northwind Legal has 900 users on Microsoft 365 E3; 150 of them also have the Copilot add-on. Records management needs every contract draft kept for 7 years from its last modification and then deleted, and any draft caught by an active litigation hold preserved until the hold is released.
804 words, about 4 min3Copilot Surfaced Salary Data - What to Fix First
Fabrikam has 800 users on Microsoft 365 E5 and ran a Copilot pilot with 120 finance staff. Within a week, pilot users reported that Copilot in Teams summarised Comp 2025 final.xlsx and a document titled Investigation - ticket 4412.
731 words, about 4 min4One Agent, Two Audiences, Two Authentication Realities
Tailspin (1,100 employees, E3 with 250 Copilot licences) wants a Field Service Helper agent. It must answer from a public product-manual website that has no sign-in, and from an internal SharePoint site holding warranty entitlement data that only the 90 warranty staff may read.
757 words, about 4 min5600 Copilot Licences, 40 Agents, One HR Incident
Adatum (5,000 users, Microsoft 365 E3) bought 600 Copilot add-on licences and 40 Copilot Studio licences. An administrator assigned all 600 by editing users one at a time in the portal: 70 went to shared service accounts with no mailbox, 45 to users disabled last quarter, and 60 to users whose mailboxes are still on-premises while the Exchange migration finishes.
762 words, about 4 min