Microsoft 365 Copilot Chat Changes April 15, 2026 — What Every IT Admin Needs to Know

If you’re an IT admin who gave users free Copilot Chat in Office apps last year and they loved it — I’m sorry, but you’re about to have some awkward conversations. Microsoft is pulling it back on April 15, 2026.

The good news? It’s not as bad as the headline sounds. There’s a loophole most people don’t know about (WXP agents), and whether your users even notice depends on how big your organisation is.

Here’s the full picture — what’s changing, what stays, what you should do before Monday morning.

Quick links: Who’s affected? · Basic vs Premium labels · WXP agents surprise · Anthropic dependency · Pricing · Admin checklist · FAQ

The Short Version of What Happened

Think of it like a free trial on your phone. Microsoft gave everyone free access to a premium app feature in September 2025, hoping people would get hooked and upgrade. Six months later, only about 3% of customers actually paid. So the free trial is ending.

flowchart TD
    A["Sept 2025
Copilot Chat made
FREE in Office apps"] -->|"6 months later"| B["March 17, 2026
MC1253858 & MC1253863
announce rollback"]
    B -->|"30 days notice"| C["April 15, 2026
Free Copilot removed
or degraded"]
    style A fill:#1a4a2a,stroke:#66ff99,color:#ffffff
    style B fill:#4a3a0a,stroke:#ffaa00,color:#ffffff
    style C fill:#5c1a1a,stroke:#ff6666,color:#ffffff

Who Is Affected and How?

This is the question I get asked most. The answer depends on one thing: how many users are in your tenant.

flowchart TD
    A["Your Org"] --> B{"Tenant size?"}
    B -->|"> 2,000 users"| C["MC1253858
Copilot REMOVED
from Word, Excel,
PPT, OneNote"]
    B -->|"< 2,000 users"| D["MC1253863
Standard access
in Word, Excel, PPT
OneNote removed"]
    style C fill:#5c1a1a,stroke:#ff6666,color:#ffffff
    style D fill:#4a3a0a,stroke:#ffaa00,color:#ffffff

Large Organisations (>2,000 users) — MC1253858

If you don’t have a paid Copilot licence, the Copilot button disappears from:

• Word
• Excel
• PowerPoint
• OneNote

Gone. No side panel, no in-app Copilot, nothing. Only paid users keep the experience.

Smaller Organisations (<2,000 users) — MC1253863

You get a softer landing. Copilot stays in Word, Excel, and PowerPoint — but under “standard access.” Here’s what that actually means:

• Speed and quality depend on available capacity
• During busy times, your experience slows down
• Paid users get priority in the queue
• You’ll see upgrade prompts encouraging you to buy a licence

OneNote Copilot is removed for everyone, regardless of size.

What Stays for Everyone

Here’s what doesn’t change — and this is important to communicate to your users:

• Copilot Chat on the web — the standalone Copilot app
• Copilot in Outlook — inbox and calendar help
• Copilot in Teams — AI chat in Teams
• Copilot Pages — collaborative AI canvas
• File upload and analysis
• Enterprise Data Protection — your data doesn’t train AI models

The New Labels: “Basic” vs “Premium”

Microsoft is making the free vs paid distinction visible in the UI:

Your users will start seeing these labels across all apps. No more confusion about which version they’re using.

📚 Full comparison: Which Copilot is right for me? on Microsoft Learn

The WXP Agent Surprise Most People Miss

Here’s the part that changes the whole story — and almost nobody is talking about it.

What Are WXP Agents?

WXP Agents are AI agents for Word, Excel, and PowerPoint that live inside the Copilot app. You talk to them in chat, and they create entire documents, workbooks, or presentations for you.

The key thing: they’re not the same as the Copilot side panel inside Office apps.

Think of it this way — it’s like losing the in-store assistant at a shop, but you still have the personal shopper who delivers to your door. Different experience, but you still get what you need.

flowchart TD
    A["Copilot Side Panel
INSIDE Word/Excel/PPT"] ---|"April 15"| B["Removed or
Degraded"]
    C["WXP Agents
IN the Copilot App"] ---|"April 15"| D["Still available
for all users"]
    style B fill:#5c1a1a,stroke:#ff6666,color:#ffffff
    style D fill:#1a4a2a,stroke:#66ff99,color:#ffffff

They Stay for Both Tenant Sizes

Even after April 15, unlicensed users in both large and small tenants can still use WXP agents:

So a user in a large enterprise who loses the Word side panel can still open the Copilot app, talk to the Word Agent, and get a full document created and saved to OneDrive.

📚 How to use them: Get started with Word, Excel, and PowerPoint Agents

The Anthropic Dependency

Here’s the catch with WXP agents — and this is the part that trips people up. They run exclusively on Anthropic’s Claude models, not OpenAI GPT.

From the official documentation:

“These agents exclusively use Anthropic’s AI models. This AI model must be enabled.”

If your admin has disabled Anthropic as a subprocessor, the WXP agents are completely hidden. Your users won’t even know they exist.

flowchart TD
    A{"Anthropic
enabled?"} -->|"Yes"| B["WXP Agents visible
& functional"]
    A -->|"No"| C["WXP Agents
completely HIDDEN"]
    style B fill:#1a4a2a,stroke:#66ff99,color:#ffffff
    style C fill:#5c1a1a,stroke:#ff6666,color:#ffffff

Default Settings by Region

This is the part you need to check RIGHT NOW:

If you’re in a non-EU commercial tenant and haven’t touched this setting — Anthropic is already on and WXP agents are working. If you’re in the EU, NZ/AU public sector, or a regulated environment, you might need to turn it on.

How to Enable It

1. Go to the Microsoft 365 Admin Center
2. Navigate to Copilot → Settings → Data access
3. Find AI providers operating as Microsoft subprocessors
4. Enable Anthropic and accept the updated terms

Only Global Administrators can do this. Full steps: Anthropic as a subprocessor

A Note on Data Protection

Anthropic in Copilot is covered by Microsoft’s Data Protection Addendum, Enterprise Data Protection, and the Customer Copyright Commitment.

⚠️ But — Anthropic models are currently excluded from the EU Data Boundary and in-country processing commitments. If you’re in a regulated industry, this matters for your compliance assessment.

What Does a Copilot Licence Cost?

Both are add-on licences on top of your existing Microsoft 365 subscription. You don’t have to licence everyone — start with your power users and expand from there.

💡 Want to build a business case? Try our Copilot ROI Calculator to estimate savings by role.

What Should You Do Now?

If You’re an IT Admin

Here’s my checklist — in order of priority:

• Check your tenant size — this determines which MC message applies to you
• Check your Anthropic setting — is it enabled? Should it be?
• Review Copilot usage — Admin Center → Reports → Usage (see who’s actually using it)
• Communicate to users before April 15 — don’t let them discover it by surprise
• Decide on licensing — buy for power users, accept the downgrade, or both?
• Check your Copilot Readiness score — are your permissions and labels in order?

If You’re an End User

• Lost the Copilot side panel? Use the Copilot web app and WXP agents instead
• Outlook and Teams? No change. Copilot still works there
• Want the full experience? Ask your IT admin about the paid licence

Summary: Before and After April 15

Key Links

Frequently Asked Questions

Why is Microsoft removing free Copilot Chat from Office apps?

About 3% of Microsoft 365 customers actually pay for the Copilot add-on licence. Microsoft gave everyone free access in September 2025, hoping the experience would sell itself. It didn’t generate enough upgrades to justify the AI infrastructure costs, so they’re pulling back the free tier to create a clearer value gap between free and paid.

What is MC1253858?

It’s a Message Center post published March 17, 2026, for organisations with more than 2,000 users. It announces complete removal of Copilot Chat from Word, Excel, PowerPoint, and OneNote for unlicensed users.

What is MC1253863?

The companion post for organisations with fewer than 2,000 users. Instead of full removal, Copilot stays in Word, Excel, and PowerPoint under “standard access” — meaning slower performance during peak hours and upgrade prompts.

What’s the difference between Copilot Chat Basic and M365 Copilot Premium?

Basic is free — web-grounded AI chat, no access to your organisational data. Premium is $30/user/month (enterprise) or $21 (business) — full in-app Copilot with Work Graph grounding, Claude model access, execution agents, and priority performance.

Can unlicensed users still use Copilot after April 15?

Yes — just in fewer places. You keep Copilot Chat on the web, Copilot in Outlook, Copilot in Teams, and WXP agents. What goes away (in large tenants) is the Copilot side panel inside Word, Excel, PowerPoint, and OneNote.

What are WXP agents?

AI agents for Word, Excel, and PowerPoint that live in the Copilot app. They create full documents from a chat prompt. Yes, they work for free users — but only if Anthropic is enabled.

Why do WXP agents need Anthropic?

They exclusively use Claude, not GPT. If Anthropic is disabled, the agents are completely hidden. Microsoft is developing a GPT-based version, but it’s not available yet.

Is Anthropic Claude enabled by default?

Non-EU commercial tenants: yes (since January 7, 2026). EU/EFTA/UK: no — admins must opt in. Government clouds: not available.

Does Copilot in Outlook change?

No. Copilot in Outlook stays for everyone — licensed and unlicensed, all tenant sizes.

How much does a licence cost?

Enterprise (>300 users): $30/user/month. Business (<300 users): $21/user/month. Annual commitment, add-on licence. See pricing.

Related Articles

• Master All 6 Microsoft 365 Copilot Agents
• Microsoft 365 Copilot March 2026 Updates
• Microsoft 365 Copilot Content Safety Controls for IT Admins
• Agent Builder in Microsoft 365 Copilot — Create AI Agents Without Code
• Learn Prompt Engineering with Practical Work-Life Prompts

Disclaimer: The views and opinions expressed in this article are my own and do not represent the official positions of Microsoft. All pricing mentioned is in USD and was sourced from official Microsoft pricing pages at the time of writing — pricing, features, and availability are subject to change. Always refer to official Microsoft documentation for the most up-to-date information.