Because a licence rollout is not a programme. We see the same three causes in almost every company that asks this question, whichever tool they bought.
Seats, not usage. The rollout was measured in licences assigned, and licences were assigned to everyone. Nobody was asked to do anything specific with theirs. Microsoft's own Copilot Dashboard reports active usage rather than seats for a reason: the two numbers diverge within weeks. Fix: assign licences to trained cohorts first, measure weekly active use, and treat an unused seat after 60 days as a reassignment, not a failure.
No manager modelling. The team's manager sent the launch email and never used the tool in a meeting. People copy what their manager does, not what the intranet says. Fix: managers attend the same workshop as their teams and, for the first eight weeks, show one thing they built in each team meeting. Two minutes is enough.
No agreed tasks. "Use Copilot to be more productive" gives nobody a starting point. Fix: three named tasks per team, agreed in Align, taught in Enable. The first time most people use an AI tool successfully is when someone shows them the exact prompt for a task they already do every week.
Three smaller causes that are worth checking. Data access: Copilot in particular is only as useful as the SharePoint and Teams content it can see, and permissions sprawl makes IT nervous enough to restrict it. Ambiguous policy: if people are not sure whether customer data is allowed, they assume not and stop. And training that was a webinar: a recorded demo is not training. Sessions need to be lab-style, on the person's own documents, with a working result at the end.