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A Rare Large-Scale Look at AI in the Wild

Microsoft Research’s new paper, “Shifting Work Patterns with Generative AI,” follows 7,137 knowledge workers from 66 large firms over six months. Half received access to Microsoft 365 Copilot—an AI assistant embedded in email, documents, and meetings—while the rest carried on as usual. The result is one of the most rigorous glimpses yet into how generative AI changes day-to-day work.

Key Findings: Big Wins on Solo Tasks

• Email Time Plummets – Regular Copilot users spent 3.6 fewer hours per week on email—a 31 % drop—freeing nearly half a workday for deeper focus. Even the broader “intent-to-treat” group shaved off 1.3 hours.

• Document Work Speeds Up – Users completed documents 5–25 % faster, especially collaborative files.

• Meetings Hold Steady – No significant change in meeting quantity or duration, underscoring that tasks needing coordination resisted early AI influence.

• Inbox at Night – Reduced out-of-hours email suggests a healthier boundary between work and personal time.

Why Only Some Behaviors Shifted

The study underlines a core truth: individual-controlled tasks adapt first. Checking email is personal; shortening meetings demands team consensus and possibly new norms. Early AI adoption, then, tends to optimize the solo workflow before reshaping collective processes.

Firm Culture Matters More Than Industry

Copilot usage varied widely, but the strongest predictor was firm-specific culture—not industry or pre-experiment habits. Organizations championing experimentation and providing lightweight guidance saw higher engagement, hinting that leadership signals can amplify AI’s benefits.

Implications for Leaders and Teams

1. Target Low-Friction Wins – Start with tasks workers already own (email triage, draft generation) to build confidence and free hours.

2. Plan for Coordination Overhauls – Transforming meetings or role responsibilities requires explicit agreements and possibly new metrics.

3. Invest in AI Literacy – Firms with structured onboarding and peer sharing drove deeper, more consistent usage. Platforms like ibl.ai’s AI Mentor can embed best practices into everyday workflows.

4. Measure Beyond Output – Track well-being indicators—like reduced after-hours email—to capture AI’s full value proposition.

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The Road Ahead

Microsoft’s experiment shows that generative AI can immediately lighten individual cognitive loads but needs broader organizational scaffolding to rewire collaborative work. As tools mature and adoption spreads, expect the next research wave to examine how teams renegotiate responsibilities, trust AI insights, and realign performance metrics.

For now, the takeaway is clear: give employees AI that tackles their inbox and draft drudgery, and they’ll reclaim precious focus time. But if you want AI to revolutionize meetings and cross-functional workflows, you’ll need more than software—you’ll need a cultural blueprint.