You open PowerPoint to use Copilot for creating slides, but the Copilot pane shows a spinning wheel and the message “Initializing” that never goes away. This usually happens because the Copilot service is waiting for a required dependency such as network authentication, a Microsoft 365 license check, or a local cache file that has become corrupted. This article explains the exact causes of the stuck initializing state and provides a step-by-step fix that resolves the problem in most cases.
Key Takeaways: Fix Copilot Stuck on Initializing in PowerPoint
- PowerPoint > File > Account > Update Options > Update Now: Ensures the Copilot client component is on the latest version that matches the service.
- Windows Settings > Accounts > Access work or school > Disconnect: Resets broken Microsoft 365 authentication tokens that block Copilot from initializing.
- Run %localappdata%\Microsoft\Office\16.0\Licensing in File Explorer: Delete the Licensing folder to clear corrupted license cache that causes the initializing loop.
Why Copilot Gets Stuck on Initializing in PowerPoint
Copilot in PowerPoint depends on three separate systems working together in sequence. The PowerPoint client sends a request to the Microsoft 365 licensing service to verify the user has a valid Copilot license. After license verification, the client connects to the Microsoft Graph API to retrieve tenant data and user context. Finally, the Copilot service initializes the AI model endpoint for generating slide content.
When any of these three stages fails, the Copilot pane displays “Initializing” indefinitely because the client is waiting for a response that never arrives. The most common root causes are:
- Outdated PowerPoint client: The Copilot feature requires build 16.0.17029.20000 or later. Older builds lack the required API endpoints.
- Corrupted authentication tokens: Stored tokens for Microsoft 365 become invalid after a password change, MFA reset, or tenant migration. The client cannot reauthenticate silently.
- Damaged license cache: The local Licensing folder stores encrypted license blobs. If these blobs become corrupted, the licensing service rejects the request and Copilot never proceeds past initialization.
- Network proxy or firewall blocking Graph API: Some corporate networks block the endpoint graph.microsoft.com or the specific Copilot service URLs.
The fix sequence below addresses each of these causes in order of likelihood and impact. Run the steps sequentially and test after each step to avoid unnecessary work.
Steps to Fix Copilot Stuck on Initializing in PowerPoint
- Update PowerPoint to the latest build
Open PowerPoint and click File > Account > Update Options > Update Now. Wait for the update to download and install. Restart PowerPoint and check if Copilot initializes. This step resolves cases where the client is too old to support the current Copilot service version. - Sign out and sign back into Microsoft 365
In PowerPoint, click File > Account. Under User Information, click Sign Out. Close PowerPoint completely. Reopen PowerPoint and click Sign In. Enter your Microsoft 365 credentials. This clears temporary token issues without deleting stored data. - Disconnect and reconnect your work or school account in Windows
Open Windows Settings > Accounts > Access work or school. Select your Microsoft 365 account and click Disconnect. Restart your computer. Open Settings > Accounts > Access work or school again and click Connect. Enter your credentials. This step removes deeply cached authentication tokens that PowerPoint cannot clear on its own. - Delete the local Licensing folder
Close all Office applications. Press Windows + R, type %localappdata%\Microsoft\Office\16.0\Licensing, and press Enter. Delete all files and subfolders inside the Licensing folder. Do not delete the folder itself. Open PowerPoint and wait 30 seconds for the licensing service to rebuild the cache. This step fixes corruption in the license blob that causes the initializing loop. - Verify network access to Copilot endpoints
Open a web browser and navigate to https://graph.microsoft.com. If the page does not load, your network or firewall is blocking Microsoft Graph. Contact your IT administrator to allow traffic to graph.microsoft.com and api.copilot.microsoft.com and all subdomains. After the network is unblocked, restart PowerPoint and test Copilot. - Repair Microsoft 365 installation
Open Windows Settings > Apps > Installed apps. Find Microsoft 365 Apps for enterprise or Microsoft 365 Apps. Click the three dots menu and select Modify. Choose Quick Repair and click Repair. Follow the on-screen instructions. If Quick Repair does not resolve the issue, run Online Repair from the same menu. This reinstalls all Office components including the Copilot client module.
If Copilot Still Shows Initializing After the Main Fix
Copilot pane appears but shows “Initializing” only on one user account
The issue is tied to a specific Microsoft 365 profile. Sign out of PowerPoint, then sign in with a different user account that has a Copilot license. If Copilot works under the second account, the original account has a corrupted user profile or missing license assignment. Ask your Microsoft 365 admin to verify the license assignment in the admin center under Billing > Licenses.
Copilot initializes but generates no slide content
This is not the same as the stuck initializing problem. If the pane loads but returns a generic error or empty response, the issue is likely a service outage or a Copilot plugin conflict. Open the Copilot pane, click the three dots menu, and select Plugins. Disable all third-party plugins and test again. If the problem persists, check the Microsoft 365 Service Health dashboard in the admin center for any active Copilot incidents.
Copilot stuck on initializing after a Windows update
A Windows update can reset network adapter settings or modify the Windows Firewall rules. Run the Network troubleshooter: Windows Settings > System > Troubleshoot > Other troubleshooters > Network and Internet > Run. If the troubleshooter does not find any issues, manually add a firewall rule for PowerPoint by searching for “Windows Firewall” in the Start menu, clicking Allow an app through firewall, and ensuring Microsoft PowerPoint is checked for both Private and Public networks.
Copilot Stuck on Initializing vs Copilot Not Appearing: Key Differences
| Item | Stuck on Initializing | Copilot Not Appearing |
|---|---|---|
| Primary symptom | Copilot pane opens but shows spinning wheel with “Initializing” text | Copilot icon or pane is completely missing from the ribbon |
| Root cause | License cache corruption, authentication token failure, or network block | Disabled Copilot add-in, missing license assignment, or outdated Office build |
| Quick fix | Delete Licensing folder and sign out of all accounts | Enable Copilot add-in under File > Options > Add-ins > COM Add-ins |
| Admin action required | Unblock Graph API endpoints on corporate firewall | Assign Copilot license in Microsoft 365 admin center |
After completing the steps above, Copilot should initialize within 10 seconds of opening the pane. If the problem returns after a few days, the most likely cause is a recurring license cache corruption triggered by a scheduled Windows or Office update. Set a monthly reminder to run the Licensing folder cleanup step as a maintenance task. For persistent issues, open a support ticket with Microsoft 365 support and reference the error code that appears in the Copilot pane debug log accessible by pressing Ctrl+Shift+I while the pane is open.