Copilot Cowork Not Showing in Microsoft 365: Availability Checklist

You open a document in Word or Excel on the web and see no Copilot Cowork button to invite a colleague to edit with you. The feature appears missing from your ribbon, your context menu, or your sharing dialog. This happens because Copilot Cowork is still rolling out and requires a specific license, a supported client, and an enabled admin policy. This article lists every requirement you must check and fix to make the Cowork button appear.

Why Copilot Cowork Does Not Appear

Copilot Cowork is a feature that lets two or more people edit a document simultaneously while Copilot assists both users in real time. The feature is not a simple sharing toggle. It requires a coordinated set of conditions across licensing, software version, network, and admin policy. If any one of these conditions is missing, the Cowork button will not render in the ribbon or the sharing dialog.

The most common root cause is the absence of a Microsoft 365 Copilot license for one of the participants. Without this license, the platform hides the Cowork entry point to prevent a broken user experience. Another frequent cause is the use of a desktop client that does not support Cowork. Only the web versions of Word, Excel, and PowerPoint, plus the Microsoft Teams desktop app, currently host the feature. A third cause is an admin policy that has not enabled Cowork for the organization or has restricted it to a specific security group that does not include the user.

Checklist to Enable Copilot Cowork

Use this ordered checklist to verify and fix each requirement. After every step, refresh the web app or restart Teams to see whether the Cowork button appears.

1. Verify the Microsoft 365 Copilot license
   Open the Microsoft 365 admin center at admin.microsoft.com. Go to Billing > Licenses. Look for a license named Microsoft 365 Copilot or Microsoft 365 Copilot Add-on. If the license is not assigned to your user account, ask your global admin to assign it. Both the host and the invited coworker must have this license.
2. Check the Microsoft 365 subscription plan
   Copilot Cowork requires a subscription from the following list: Microsoft 365 E3, Microsoft 365 E5, Microsoft 365 Business Basic, Microsoft 365 Business Standard, Microsoft 365 Business Premium, or Microsoft 365 F3. If your organization uses an older plan such as Office 365 E1 or Office 365 E2, upgrade to a qualifying plan before the Cowork button will appear.
3. Use a supported client application
   Open the document in the web version of Word, Excel, or PowerPoint. Go to office.com, sign in, and open the file from OneDrive or SharePoint. Cowork does not work in the desktop versions of these apps. For Microsoft Teams, use the desktop app version 1.6 or later. In Teams, open a chat or channel and select the Copilot Cowork tab to start a session.
4. Enable Copilot Cowork in admin policies
   Go to the Microsoft 365 admin center at admin.microsoft.com. Navigate to Settings > Org settings > Copilot. Select Cowork. Set the policy to On for everyone or select a specific security group that includes your user account. Save the change. Wait up to 15 minutes for the policy to propagate.
5. Confirm network access to required endpoints
   Copilot Cowork communicates with Microsoft Graph and the Copilot service. Ensure your firewall and proxy allow traffic to these endpoints: copilot.microsoft.com and all subdomains, graph.microsoft.com and all subdomains, and sharepoint.com. If your organization uses a web filter, add these domains to the allowlist.
6. Update the browser or Teams app
   Use the latest version of Microsoft Edge, Google Chrome, or Mozilla Firefox. For Teams, install the latest update from the Teams admin center or from the Microsoft 365 Apps update channel. Outdated clients may not render the Cowork button even when all other conditions are met.
7. Sign out and sign back in
   After completing the steps above, sign out of all Microsoft 365 sessions. Close the browser or Teams app. Wait 60 seconds. Sign in again, open a document, and look for the Copilot Cowork button in the ribbon under the Home tab or in the Share dialog.

When Copilot Cowork Still Does Not Appear

Copilot Cowork button is grayed out

A grayed-out button means the feature is recognized but cannot start. This usually happens when the document is not saved to OneDrive or SharePoint. Save the file to a cloud location before starting a Cowork session. Also verify that the document is not in Compatibility Mode. Convert the file to the current format using File > Info > Convert.

Cowork session fails after the button is clicked

If the button is visible but clicking it produces an error, the invited coworker likely lacks a Copilot license or is using an unsupported client. Send the coworker the checklist above. Also check that both users are in the same tenant. Cross-tenant Cowork sessions are not supported in the current release.

Cowork button appears only in some apps

Cowork is currently available in Word on the web, Excel on the web, PowerPoint on the web, and Microsoft Teams desktop. It is not available in Outlook, OneNote, SharePoint pages, or the Microsoft 365 mobile apps. If you see the button in Word on the web but not in Excel, the Excel file may be in a format that does not support real-time coauthoring. Save the Excel file as .xlsx and try again.

Copilot Cowork vs Standard Coauthoring: Key Differences

Item	Copilot Cowork	Standard Coauthoring
License required	Microsoft 365 Copilot license for all participants	Any Microsoft 365 license that includes the web or desktop app
Copilot assistance	Both users can invoke Copilot to generate, summarize, or rewrite content during the session	No Copilot integration; users edit manually
Supported clients	Word, Excel, PowerPoint on the web; Microsoft Teams desktop	All web, desktop, and mobile versions of Office apps
Admin policy required	Explicitly enabled in Copilot settings under Cowork	Enabled by default in SharePoint and OneDrive sharing settings
Session visibility	Dedicated Cowork button in ribbon and Share dialog	Standard coauthoring indicators in the status bar

You can now run through the seven-step checklist to identify and fix the missing Copilot Cowork button. Start by confirming the Copilot license assignment in the admin center, then move through the client, policy, and network checks. If the button remains hidden after all steps, use the Microsoft 365 admin center support ticket system to verify that your tenant is included in the Copilot Cowork rollout ring. The feature is being deployed gradually, so some tenants may receive it weeks after the global announcement.