You just provisioned a new Microsoft 365 E5 tenant and want to enable Copilot for your users. The setup process involves assigning licenses, configuring data access, and verifying that Copilot appears in the apps your team uses every day. Without the correct steps, Copilot may remain hidden or generate responses that ignore your tenant data.
Microsoft Copilot for Microsoft 365 requires an add-on license purchased on top of your E5 subscription. The E5 plan provides the base Office apps and security features, but Copilot needs its own per-user seat. This article walks you through the entire setup sequence from license assignment to first test prompt.
You will learn how to buy and assign Copilot licenses, configure data source permissions, enable the Copilot side pane in Microsoft 365 apps, and confirm that grounded responses pull from your tenant content. The guide also covers common pitfalls such as missing admin consent and stale service plans.
Key Takeaways: Copilot Setup in a New E5 Tenant
- Microsoft 365 admin center > Billing > Purchase services: Buy Copilot for Microsoft 365 add-on licenses for each user who needs Copilot access.
- Microsoft 365 admin center > Users > Active users > Licenses and apps: Assign the Copilot service plan to each user after the license is purchased.
- Microsoft 365 admin center > Settings > Org settings > Copilot: Configure data sources to allow Copilot to read SharePoint, OneDrive, and Exchange content for grounded responses.
What Copilot for Microsoft 365 Requires in an E5 Tenant
Copilot for Microsoft 365 is an add-on that sits on top of your existing Microsoft 365 E5 subscription. The E5 plan includes Office apps, Exchange Online, SharePoint Online, Teams, and advanced security features. Copilot adds generative AI capabilities that work directly inside Word, Excel, PowerPoint, Outlook, Teams, and the Copilot web experience.
The key prerequisite is a valid Microsoft 365 E5 license for each user who will use Copilot. You cannot enable Copilot on a tenant that has only free or trial E5 licenses. Each user must have an active paid E5 seat, and then you must purchase and assign a separate Copilot for Microsoft 365 add-on license for that same user.
Copilot requires Microsoft Graph data access to generate grounded responses. Grounded responses are answers that reference your tenant content such as documents, emails, calendar events, and chat messages. To enable this, you must consent to the Microsoft Graph permissions during setup and configure which data sources Copilot can read.
The Copilot service plan appears in the Microsoft 365 admin center under the user’s license assignment. If the service plan is not visible, the add-on license was not purchased correctly or the tenant is in a region where Copilot is not yet available. Verify your tenant’s region in the Microsoft 365 admin center under Settings > Org settings > Organization profile > Country or region.
Steps to Buy and Assign Copilot Licenses in a New E5 Tenant
Follow these steps to purchase Copilot for Microsoft 365 licenses and assign them to users. You must be a Global admin or Billing admin to complete the purchase.
- Sign in to the Microsoft 365 admin center
Go to admin.microsoft.com and sign in with an account that has Global admin or Billing admin role. - Navigate to Billing > Purchase services
In the left navigation, select Billing and then Purchase services. Use the search bar to find Copilot for Microsoft 365. - Select the Copilot add-on plan
Click Copilot for Microsoft 365 and then click Buy. Choose the number of licenses you need. A good starting point is one license per user who will test Copilot. Complete the checkout process. - Wait for license provisioning
After purchase, licenses may take up to 30 minutes to appear in the tenant. Refresh the admin center after 10 minutes if the licenses are not visible. - Assign licenses to users
Go to Users > Active users. Select the user you want to enable Copilot for. Click the Licenses and apps tab. Expand the Apps list and turn on the toggle for Microsoft Copilot for Microsoft 365. Click Save changes. - Repeat for each user
Assign the license to all users who need Copilot access. You can also use bulk assignment by selecting multiple users, clicking Manage product licenses, and enabling the Copilot service plan.
Configure Data Access for Grounded Responses
After licenses are assigned, you must tell Copilot which data sources it can use. By default, Copilot can read content from SharePoint, OneDrive, Exchange Online, and Teams. You can restrict or expand these sources in the admin center.
- Go to Settings > Org settings > Copilot
In the Microsoft 365 admin center, select Settings then Org settings. Find the Copilot tab and click it. - Enable Microsoft Graph data access
Under Data sources, ensure the toggle for Microsoft Graph is turned on. This allows Copilot to access content from SharePoint, OneDrive, Exchange, and Teams. - Configure optional sources
If you use third-party data connectors, you can enable them here. For a new tenant, start with Microsoft Graph only. You can add connectors later. - Set content search scope
Under Content search, choose All content or Specific sites. For testing, select All content so Copilot can pull from any document the user has permission to read. - Save and wait for propagation
Click Save. Configuration changes may take up to 24 hours to fully propagate across the tenant. Users may see limited grounding until propagation completes.
Test Copilot in Microsoft 365 Apps
After licenses and data sources are configured, test Copilot in at least one app to confirm it works.
- Sign out and sign back in
Tell the user to sign out of all Microsoft 365 apps and sign back in. This forces the new license assignment to take effect. - Open Word and locate the Copilot icon
Launch Word and look for the Copilot icon on the right side of the ribbon. If the icon is missing, go to View > Show Copilot to enable the side pane. - Send a test prompt
Click the Copilot icon and type a prompt such as Summarize the document in the current folder. Copilot should respond with a summary based on the document content. - Verify grounded responses
Ask a question that requires tenant data, for example Find the budget spreadsheet from last quarter. If Copilot returns a file name and link, the grounding is working.
Common Setup Issues and Fixes
Copilot icon not appearing in any app
The most common cause is that the Copilot service plan was not enabled on the user’s license. Go to Users > Active users, select the user, and check the Licenses and apps tab. Confirm that Microsoft Copilot for Microsoft 365 is toggled on. If it is off, turn it on and have the user sign out and sign back in.
Copilot responds with generic answers instead of tenant data
This happens when Microsoft Graph data access is not enabled. Go to Settings > Org settings > Copilot and confirm the Microsoft Graph toggle is on. Also verify that the user has at least read permission to the content they are asking about. Copilot cannot access content the user cannot see.
Error message: Copilot is not available in your region
Copilot for Microsoft 365 is not available in all regions. Check the Microsoft 365 admin center under Settings > Org settings > Organization profile and note the country or region. If the region is not supported, you cannot enable Copilot on this tenant. You must create a tenant in a supported region or use a different license type such as Copilot Pro for personal accounts.
Copilot for Microsoft 365 vs Copilot Pro: Key Differences
| Item | Copilot for Microsoft 365 | Copilot Pro |
|---|---|---|
| License requirement | Requires Microsoft 365 E3, E5, Business Standard, or Business Premium base license | No base license required; works with personal Microsoft account |
| Data grounding | Grounded in tenant SharePoint, OneDrive, Exchange, and Teams content | Grounded in public web data and personal OneDrive files only |
| Admin controls | Full admin control over data sources, content scope, and user assignment | No admin controls; each user manages their own settings |
| App integration | Integrated into Word, Excel, PowerPoint, Outlook, Teams, and Copilot web | Integrated into Copilot web, and limited to Word, Excel, and PowerPoint on desktop |
| Commercial use rights | Covered by Microsoft’s commercial use terms and data protection | Not covered for commercial use; subject to consumer terms |
After completing these steps, your new Microsoft 365 E5 tenant will have Copilot ready for your users. Start with a small group of test users to verify that grounded responses pull from SharePoint and OneDrive content. If Copilot does not return tenant-specific answers, check the data source configuration and the user’s content permissions. As a next step, explore Copilot’s capabilities in Teams meetings where it can summarize chat history and action items automatically.