Microsoft Copilot Hits 20M Paid Users, Matches Outlook Usage

Key Takeaways

• M365 Copilot now has 20 million paid enterprise seats with weekly engagement matching Outlook
• Accenture signed for 740,000 seats, Microsoft's largest Copilot deal to date
• Agent mode is now the default experience across Word, Excel, and PowerPoint

The Numbers Behind the Growth

Microsoft wants to squash any perception that Copilot is shelfware. During the company's quarterly earnings call Wednesday, CEO Satya Nadella reported that M365 Copilot has reached 20 million paid enterprise seats. That's not just license sales sitting unused. Nadella claims people are actually opening the thing.

"Copilot queries per user were up nearly 20% quarter over quarter," Nadella said. "To put this momentum in perspective, weekly engagement is now at the same level as Outlook. This is like a daily habit of intense usage."

The Outlook comparison is notable. Email remains one of the most-used enterprise applications on the planet. If Copilot engagement genuinely matches that level, it suggests the AI assistant has crossed from "nice to have" to daily workflow tool for many users.

Enterprise Customers Are Going Big

Microsoft has quadrupled the number of companies paying for more than 50,000 Copilot seats. Nadella name-dropped several major customers: Bayer, Johnson & Johnson, Mercedes, and Roche each have over 90,000 seats deployed.

The headline deal came earlier this week when Accenture signed for more than 740,000 seats. "Our largest Copilot win to date," Nadella called it. That single contract puts Copilot in front of a significant chunk of Accenture's 700,000+ global workforce.

Morgan Stanley analyst Keith Weiss seemed genuinely surprised by the traction. "Those Microsoft 365 Copilot numbers are super impressive and I think way ahead of most people's expectations," he said on the earnings call.

Agent Mode Goes Default

Part of what's driving engagement is a feature shift. As of last week, Agent mode is now the default experience across Copilot in Word, Excel, and PowerPoint. Microsoft made its Copilot agentic capabilities generally available, allowing the AI to take multi-step actions directly in documents.

"You now have a new way to delegate and complete work using Copilot," Nadella explained. Rather than just answering questions or generating text, the agent can execute sequences of tasks. Think: reformatting a spreadsheet, then creating a chart, then inserting it into a presentation.

Not Locked to OpenAI

Nadella also emphasized that Copilot isn't tethered to a single AI model. "You now have access in chat to multiple models by default, with intelligent auto routing in agents with critique and counsel, you can use multiple models together to generate optimal responses," he said.

Microsoft 365 now supports Anthropic's Claude alongside OpenAI models. This multi-model approach lets Microsoft route queries to whichever model performs best for specific tasks. It also reduces dependency risk if any single AI provider stumbles.

What This Means for Enterprise AI Adoption

Microsoft's numbers provide a benchmark for the enterprise AI assistant market. Competitors like Google's Duet AI and various standalone tools now have a target to beat. The Accenture deal also signals that consulting firms, which often set IT trends for their clients, are betting heavily on AI augmentation.

For organizations still evaluating Copilot, the usage statistics suggest the tool delivers enough value to warrant daily engagement. The agent mode shift could accelerate adoption further by reducing the friction of simple automation tasks.

Frequently Asked Questions

How many people are using Microsoft Copilot?

Microsoft reports 20 million paid enterprise seats for M365 Copilot as of April 2026, with weekly engagement matching Outlook usage levels.

What is Copilot Agent mode?

Agent mode allows Copilot to take multi-step actions in documents rather than just answering questions. It can execute sequences of tasks across Word, Excel, and PowerPoint.

Does Microsoft Copilot only use OpenAI models?

No. Microsoft 365 now supports multiple AI models including Anthropic's Claude. The system uses intelligent routing to select the best model for each task.

Which companies are using Microsoft Copilot?

Major customers include Accenture (740,000+ seats), Bayer, Johnson & Johnson, Mercedes, and Roche (each with 90,000+ seats).

Source: TechCrunch / Julie Bort