The readiness report is green, and the next ticket is waiting. It can be tempting to switch Copilot on for everyone. Green confirms licensing readiness. Safety and approval still need their own evidence. Because Copilot can answer from content each person already opens, years of loose sharing may suddenly be reachable through one ordinary question.
These four lessons take you from "should we turn it on?" to a rollout decision a reviewer can follow line by line. You'll prepare the tenant, deal with oversharing, test data controls, investigate Copilot activity, and govern agent identities, access, and spending.
Reports, counts, and saved policies all belong in the evidence record. Evidence that a control is enforced comes from testing, and a rollout still needs an authorized decision. You'll keep findings separate from decisions, temporary containment separate from permanent repair, and configuration separate from observed results. AB-900 tests the same administrative discipline, so this work also supports your certification preparation.
What you'll walk away with
Reconcile readiness evidence into a go/no-go rollout call you can defend
Remediate SharePoint oversharing and validate the resulting Copilot data boundary
Configure and test the Copilot DLP location alongside its sensitivity-label controls
Investigate Copilot activity with audit, eDiscovery, and Zero Trust discipline
Govern agent identity, access, spend, and analytics without overclaiming their value
