SharePoint Document Issues

How to Open SharePoint PDFs and DWG Files Directly in Desktop Apps

Maira Mehtab Sep 22, 2026 869 views

Question details

A business migrating to SharePoint Online wants to configure the system to open PDFs and DWG files directly in native desktop software (like Bluebeam and CAD) instead of the browser, while bypassing repeated untrusted-source security warnings.

Product: SharePoint Online
Device & OS: not provided
Scenario: Accessing and editing non-Microsoft Office files (PDFs and DWGs) stored in a SharePoint Online environment.
Observed behavior: Files default to opening in the SharePoint web previewer, and attempting to launch them in desktop applications triggers repetitive untrusted-source confirmation prompts.

Before you start

Ensure you have administrator access to your Windows device to modify default file associations, and that your target desktop applications (Bluebeam, AutoCAD) are updated to their latest versions.

Solution 1Recommended

Sync SharePoint Libraries to File Explorer (Recommended)

The most reliable way to force non-Office files to open in local desktop apps is to sync your SharePoint document library directly to your local computer.

SharePoint's native 'Open in Desktop App' feature is primarily designed for Microsoft Office file types (Word, Excel, PowerPoint). For PDFs and DWG files, utilizing the OneDrive sync client bridges the gap between cloud storage and local software.

Navigate to SharePoint

Open your web browser, log into SharePoint Online, and navigate to the specific Document Library containing your PDFs and DWG files.

Initiate Library Sync

Click the 'Sync' button located in the command bar at the top of the document library. Alternatively, you can click 'Add shortcut to OneDrive'.

Open via File Explorer

Open Windows File Explorer and locate your organization's synced folder on the left navigation pane. Double-clicking any PDF or DWG file here will automatically open it in your default local desktop application.

Bypass Security Prompts: Opening files through Windows File Explorer via the OneDrive sync client naturally bypasses the browser's untrusted-source warnings, providing a seamless desktop experience.

Solution 2

Configure Browser Extensions and Trusted Sites

If you must open files directly from the SharePoint web interface, you can use browser extensions and security settings to route files to desktop apps.

Free Microsoft Office alternative

Seamlessly View and Edit Office and PDF Files

If you are managing complex workflows involving both Office documents and PDFs, WPS Office provides a lightweight, unified suite. It includes a powerful native PDF editor alongside standard word processing and spreadsheet tools, eliminating the need to juggle multiple expensive desktop applications.

1. Download WPS Office: Visit the official WPS website to download and install the free WPS Office suite on your local machine.
2. Set as Default Application: During setup, select the option to make WPS Office your default application for opening PDF files and standard Office documents.
3. Access Synced Files: Open your synced SharePoint folders via Windows Explorer and double-click your files to edit them natively in WPS Office.

Native, feature-rich PDF reading and editing built directly into the suiteHigh compatibility with Microsoft Word, Excel, and PowerPoint formatsLightweight desktop application that handles large files smoothlyFamiliar user interface requiring zero learning curve for new users

microsoft office alternative - wps office

Frequently Asked Questions

Why do PDFs default to opening in the SharePoint browser preview?

SharePoint is designed to provide quick, lightweight previews of files directly in the browser to save time and bandwidth. While convenient for viewing, it lacks the advanced editing capabilities of dedicated desktop software like Bluebeam.

Can I force SharePoint to open all PDFs in the desktop app automatically?

Unlike Microsoft Word or Excel files, SharePoint does not have a native 'Open in Desktop App' toggle for PDFs or DWGs in the web interface. You must rely on third-party browser extensions or use the OneDrive sync method to open them locally.

How do I stop the untrusted-source confirmation pop-ups?

These pop-ups are triggered by your browser or operating system's security settings. You can resolve this by adding your SharePoint site URL to the 'Trusted sites' list in Windows Internet Options, which establishes a secure trust relationship.

Document & File Issues