OneDrive Admin Checklist: 0x8004de40 sign-in error appears after password reset for new employees

When a new employee resets their password and tries to sign in to OneDrive, error 0x8004de40 can block the connection. This error typically appears as a dialog that says “Sign in required” or “Something went wrong” with the error code 0x8004de40. The root cause is a mismatch between the cached credentials on the device and the new password stored in Microsoft Entra ID. This article provides an admin-focused checklist to resolve the error, verify tenant settings, and prevent it from recurring for new hires.

Why Error 0x8004de40 Occurs After a Password Reset

Error 0x8004de40 is a sign-in failure that occurs when the OneDrive sync client cannot authenticate with the Microsoft 365 cloud service. After a password reset, the local Windows machine still holds the old password hash in the Credential Manager vault. When OneDrive tries to refresh its token using the old credentials, Microsoft Entra ID rejects the request, and the sync client returns error 0x8004de40.

For new employees, the situation is more common because the device may have been set up with a temporary password that was never saved in the credential store. If the employee resets the password before OneDrive completes the initial sync, the cached token becomes invalid. The sync client then shows the error repeatedly until the stored credentials are cleared.

Another contributing factor is the Windows Web Account Manager, which caches the primary refresh token. A password reset invalidates this token, but WAM might not release it automatically. This is why simply signing out and back in to OneDrive often fails to fix the error.

Admin Checklist to Fix 0x8004de40 for New Employees

Follow these steps in order. Perform steps 1 through 3 on the employee’s device. Steps 4 and 5 are done in the Microsoft 365 admin center.

1. Clear OneDrive cached credentials in Credential Manager
   On the employee’s Windows device, open Control Panel and select Credential Manager. Click Windows Credentials. Scroll to the Generic Credentials section. Look for entries that start with MicrosoftOffice or OneDrive C2C. Click the arrow to expand each entry, then click Remove. Confirm the removal. Repeat for any entry containing the employee’s work email address. This forces OneDrive to request a fresh token during the next sign-in attempt.
2. Unlink and re-link OneDrive on the device
   Right-click the OneDrive cloud icon in the system tray and select Settings. Go to the Account tab. Click Unlink this PC. Confirm the action. OneDrive will close. Open OneDrive again from the Start menu. Sign in with the employee’s new password. Complete the folder setup wizard. This process invalidates the old token and creates a new one tied to the current password.
3. Sign out of Office apps and sign back in
   Open any Office app such as Word or Outlook. Go to File > Account. Under User Information, click Sign out. Close the app. Open the app again and click Sign in. Use the employee’s new password. This ensures the Office token matches the OneDrive token, preventing cross-service authentication failures.
4. Verify OneDrive license assignment in the admin center
   Go to the Microsoft 365 admin center at admin.microsoft.com. Navigate to Users > Active users. Select the new employee’s account. Click the Licenses and apps tab. Confirm that OneDrive for Business or SharePoint is checked. If the license was assigned before the password reset, uncheck it, save, wait two minutes, then recheck it and save again. This triggers a license re-provisioning that refreshes the service principal.
5. Check service health and tenant sync restrictions
   In the admin center, go to Health > Service health. Verify that OneDrive and Microsoft Entra ID show a green checkmark. Then go to Settings > Org settings > OneDrive. Scroll to Sync. Ensure Allow syncing only on PCs joined to specific domains is either turned off or includes the employee’s device domain. If this setting blocks the employee’s device, OneDrive will fail to sync regardless of password correctness.

If OneDrive Still Shows 0x8004de40 After the Checklist

OneDrive shows the error only on shared folders

The employee can access their own OneDrive files but sees error 0x8004de40 when opening a shared folder. This occurs when the sharing invitation was sent before the password reset and the cached token for the shared site is stale. Have the employee remove the shared folder from OneDrive: right-click the folder in File Explorer, select OneDrive > Stop syncing. Then re-add the folder by opening OneDrive settings, going to Account, and clicking Add a shortcut to My files. Enter the shared folder URL.

Error persists after unlink and re-link

If the error returns after unlinking and re-linking, the Windows Web Account Manager still holds an invalid token. Open a Command Prompt as administrator and run wsreset.exe to clear the Microsoft Store cache, which also flushes WAM tokens. Restart the device. Then repeat step 2 of the checklist. This resolves the error in most persistent cases.

Multiple new employees get the same error

If several new hires report error 0x8004de40 after password resets, the tenant may have a Conditional Access policy that blocks modern authentication. Go to the Microsoft Entra admin center at entra.microsoft.com. Navigate to Protection > Conditional Access > Policies. Look for a policy that targets All cloud apps or Office 365 and has Grant access set to Require multi-factor authentication. If the new employee has not yet registered for MFA, the OneDrive authentication is blocked. Temporarily exclude the employee from the policy or guide them through MFA registration before they reset their password.

Manual Credential Clear vs Unlink and Re-link: Key Differences

Item	Manual Credential Clear	Unlink and Re-link
Scope	Removes all cached OneDrive and Office tokens from Credential Manager	Removes the OneDrive sync relationship and deletes local sync metadata
Effect on files	No files are deleted; the sync client must re-authenticate	Local files remain but the sync status is reset; a full re-sync may occur
When to use	When the error appears immediately after sign-in and before any sync starts	When the error appears after the sync client has been running for days
Admin intervention required	No; the employee can perform this step on their own	No; the employee can perform this step on their own
Success rate for 0x8004de40	High when combined with a device restart	High when credential clear was skipped

Error 0x8004de40 after a password reset is caused by stale cached credentials that Windows and OneDrive do not automatically discard. The checklist above gives you a reliable sequence to clear those credentials, re-establish authentication, and verify tenant settings. For recurring cases, check Conditional Access policies and ensure MFA registration is complete before the password reset. As a preventive measure, instruct new employees to sign in to OneDrive first with their temporary password, then reset the password only after the initial sync finishes. This avoids the token mismatch that triggers error 0x8004de40.