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Fix OneDrive Access Denied After Synchronizing with Synology Drive
Question details
Users experience an 'Access Denied' error or lose access to their personal and shared files in OneDrive after syncing the same folder using Synology Drive.
- Product
- OneDrive
- Device & OS
- Windows
- Scenario
- Synchronizing local OneDrive folders using the third-party Synology Drive client.
- Observed behavior
- The synchronization process triggers permission conflicts, resulting in synchronization errors and preventing the user from accessing their own files locally or in the cloud.
Before troubleshooting, ensure your device is connected to the internet and temporarily back up any recently modified local files to a separate, non-synchronized folder.
Pause Synology Synchronization and Test Web Access
Temporarily stopping the third-party synchronization helps isolate whether Synology Drive is locking the files and causing the OneDrive access errors.
Running two active synchronization engines on the same folder can cause aggressive file locking. By pausing Synology Drive, you allow OneDrive to operate independently and verify if the files are still intact on the cloud.
Open the Synology Drive Client from your Windows system tray. Click on the synchronization task managing your OneDrive folder and select 'Pause' or temporarily unlink the connection.
Open your web browser, navigate to the official OneDrive website, and log in with your Microsoft account.
Attempt to open or download the files that were previously returning an 'Access Denied' error. If they open successfully, the issue is strictly related to local synchronization conflicts.
Verify and Fix Windows Folder Permissions
Ensure your local Windows user account has the necessary read and write permissions for the synchronized folder.
Simplify Document Management with WPS Office
Tired of dealing with complex synchronization errors and permission conflicts? WPS Office is a powerful, lightweight alternative to Microsoft Office that offers seamless built-in cloud storage, helping you avoid frustrating third-party file locks.
- 1. Download the Installer: Visit the official WPS Office website and download the free version for your operating system.
- 2. Install and Launch: Follow the on-screen instructions to install the software, then launch WPS Office.
- 3. Enable WPS Cloud: Sign in with your email or social account to activate WPS Cloud, ensuring your documents are safely synced without third-party interference.
Frequently Asked Questions
Why does synchronizing OneDrive with Synology Drive cause access denied errors?
Both OneDrive and Synology Drive attempt to manage file metadata, locks, and permissions simultaneously. This overlap often leads to permission conflicts where one service locks a file for synchronization, preventing the other service—and the user—from accessing it.
Can I safely back up my OneDrive files to a Synology NAS?
Yes. Instead of using a two-way sync on your active local PC folder, it is highly recommended to use the Synology 'Cloud Sync' package directly on your NAS interface. This securely backs up your OneDrive data from the cloud to the NAS without interfering with your local Windows file permissions.
What should I do if my local OneDrive folder remains entirely inaccessible?
If editing the local security properties does not restore access, unlink your PC from OneDrive via the account settings. Then, rename the problematic local folder (e.g., 'OneDrive_Old') and set up OneDrive again to download a fresh, uncorrupted copy of your files from the cloud.
