Copilot Chat now has hidden usage caps that cut off features without warning

Microsoft is extending hidden usage limits to more features inside Copilot Chat for commercial users who access it through an existing Microsoft 365 subscription but do not hold a separate Microsoft 365 Copilot licence. The caps are not published, and you will only find out you have hit one when a feature stops working.

What happened

Microsoft 365 Copilot Chat is included with qualifying Microsoft 365 business and enterprise plans, including Business Basic, Business Standard, Business Premium, Office 365 E3 and E5, and Microsoft 365 E3 and E5. Without the paid Copilot add-on licence, it can reason over web information and uploaded files.

Microsoft already applied fair-use limits to some capabilities, such as image generation. It is now extending those limits to additional Copilot Chat features. It has not said which features are affected or what the thresholds are. According to The Register, Microsoft says it "doesn't publish specific limits because they're subject to change."

The rollout started 2 November for organisations with 2,000 or fewer Microsoft 365 seats. It is scheduled to start 9 November for larger organisations. Web, desktop and mobile apps are all affected.

What it means for your work

• When you hit a cap, you receive an in-product notice telling you when you can use that feature again. Your work in progress will not be interrupted.
• Your IT admin cannot see the limits, configure them or override them. Microsoft sets them centrally.
• The notification may include an option to request a Microsoft 365 Copilot licence from your admin, or, if your organisation allows it, to buy one directly. Admins can turn off direct purchases.
• Analysts quoted by Computerworld warn that unpredictable limits reduce trust. As Nhat Bui, deputy director of engineering at Scopic Software, put it: "If a feature stops working mid-afternoon without warning and they can't tell when or why, they stop relying on it for anything that matters."
• Staff who hit limits may turn to other AI tools outside company-approved software, which creates a headache for IT governance.

What to do now

1. Tell your team that Copilot Chat features may stop mid-day if they use them heavily, and that this is not a technical fault.
2. Ask your IT admin to check the Microsoft 365 Message Center for the full policy notice before 9 November if your organisation has more than 2,000 seats.
3. If Copilot Chat is part of a regular workflow, such as summarising documents or drafting emails, identify a backup approach in case a cap is reached.
4. If you manage licences, be ready for staff to request a Microsoft 365 Copilot upgrade through the admin centre.

The safest assumption right now is that any Copilot Chat feature you use heavily could become temporarily unavailable, with no advance notice of exactly when.