Can Office Web Apps Open Files from a Mapped Network Drive?
Question details
The user wants to know if it is possible to open, view, and edit files stored on a mapped network drive directly through browser-based Microsoft Office Web Apps.

- Product
- Microsoft Office Web Apps
- Device & OS
- not provided
- Scenario
- Attempting to access and edit documents hosted on a local or company mapped network drive via the browser-based version of Microsoft Office.
- Observed behavior
- Office Web Apps cannot directly access or open files located on mapped network drives; the system requires files to be hosted in a supported online location.
Verify that you have an active Microsoft 365 account with access to OneDrive or SharePoint Online, as browser-based Office applications require cloud-based storage to function properly.
Migrate Files to SharePoint Online or OneDrive
Move your documents from the mapped network drive to Microsoft's supported cloud storage services to enable browser-based editing.
Microsoft Office Web Apps operate entirely within the cloud ecosystem. To edit documents in your browser, the files must first be uploaded to a Microsoft-supported online location. Moving your files to OneDrive or a team SharePoint site resolves the access issue and unlocks additional features like real-time co-authoring.
Log in to your Microsoft 365 account in a web browser and navigate to either OneDrive or your designated SharePoint site.
Click the 'Upload' button, choose 'Files' or 'Folder', navigate to your mapped network drive in the file explorer window, and select the items you want to edit online.
Once the upload is complete, simply click on the document name within the browser. It will automatically open in the corresponding Office Web App (Word, Excel, or PowerPoint) for immediate editing.

Use Desktop Office Applications Instead
If organizational policies dictate that files must remain on the mapped network drive, use the installed desktop versions of Microsoft Office to edit them.
Use WPS Office to Seamlessly Edit Local and Network Files
If you are frustrated by the cloud-only limitations of Office Web Apps and need a robust way to edit files directly from mapped network drives, consider WPS Office. It is a lightweight, free alternative that perfectly handles local network drives while maintaining exceptional compatibility with all Microsoft Office file formats.
- 1. Install WPS Office: Download and install the free WPS Office suite on your computer.
- 2. Access your network drive: Launch WPS Office, click 'Open', and navigate directly to your mapped network drive.
- 3. Edit instantly: Select your document and begin editing natively without needing to sync or upload to a browser.

Frequently Asked Questions
Why does Office Online require files to be in OneDrive or SharePoint?
Office Web Apps operate natively within the Microsoft 365 cloud environment. They require files to be hosted on Microsoft's own servers (SharePoint or OneDrive) to facilitate web-based rendering, real-time co-authoring, auto-saving, and secure browser access.
Can I map a SharePoint document library as a network drive?
Yes. You can bridge the gap between local file management and cloud storage by mapping a SharePoint drive to your Windows File Explorer. You can do this by using the 'Sync' button in your SharePoint library or utilizing the 'Add a network location' wizard in Windows.
Is there any quick workaround to open local PC files in Office Web Apps?
The fastest official workaround is to drag and drop a file from your PC or mapped network drive directly into the Office.com browser portal. The system will automatically upload the file to your personal OneDrive and immediately open it in the web app.




