Fix Unable to Fill Out PDFs in Adobe Acrobat for Microsoft Edge
Question details
The user cannot fill out PDF forms using the Adobe Acrobat extension in Microsoft Edge due to a false 'digitally signed' restriction error.

- Product
- Adobe Acrobat Extension for Microsoft Edge
- Device & OS
- not provided
- Scenario
- Attempting to fill out an interactive PDF form directly within the Microsoft Edge browser.
- Observed behavior
- The Adobe Acrobat extension falsely reports that the PDF is digitally signed and states that form filling is unsupported, blocking input on all PDFs opened in Edge.
Before troubleshooting the extension, download the PDF to your local hard drive and open it with a dedicated desktop PDF reader to confirm the file is not actually locked or corrupted.
Update Microsoft Edge and the Acrobat Extension
Outdated browser or extension versions can cause compatibility glitches, resulting in false security warnings that block form filling.
Browser extensions frequently receive updates to fix bugs and improve compatibility with the latest browser versions. Updating both Microsoft Edge and the Adobe Acrobat extension can resolve unexpected parsing errors.
Open Microsoft Edge, click the three-dot menu in the top-right corner, and select 'Help and feedback' > 'About Microsoft Edge'. The browser will automatically check for and install updates.
Click the Extensions puzzle icon next to the address bar and select 'Manage extensions' from the dropdown menu.
Toggle on 'Developer mode' in the left sidebar or bottom-left corner. Click the 'Update' button at the top to force an update for all installed extensions.
Close all Edge browser windows and reopen Microsoft Edge. Open your PDF file again to see if the form fields are now editable.

Test the PDF in Another Browser or Desktop App
Determine if the issue is isolated to the Edge extension or if it's a file-specific restriction.
Fill Out PDF Forms Offline with WPS Office
Bypass browser extension errors entirely by filling out interactive PDF forms using the WPS Office desktop application. It offers dedicated PDF editing tools that ensure smooth form filling, saving, and printing without relying on web browsers.
- 1. Download and Install: Download WPS Office Free from the official website and install it on your computer.
- 2. Open Your PDF: Launch WPS Office, click 'Open' on the home screen, and browse for your PDF form.
- 3. Fill the Form: Click directly on the interactive form fields to type your information. If the form isn't interactive, use the 'Insert Text' tool from the Edit tab.
- 4. Save Your Changes: Go to 'Menu' and click 'Save As' to export your filled-out PDF document securely to your local drive.

Frequently Asked Questions
Why does Adobe Acrobat say my unsigned PDF is digitally signed?
This is typically a glitch within the browser extension version of Adobe Acrobat, where it incorrectly parses document security metadata. Updating the browser, updating the extension, or clearing the browser cache usually resolves this false warning.
Can I fill out a PDF without using Microsoft Edge?
Yes. You can download the PDF file directly to your local computer and open it with a dedicated desktop application like WPS Office to fill it out offline.
How do I reinstall the Adobe Acrobat extension in Edge?
Open Microsoft Edge, click the Extensions icon in the toolbar, select 'Manage extensions', locate Adobe Acrobat, and click 'Remove'. Afterward, visit the Edge Add-ons store, search for Adobe Acrobat, and click 'Get' to reinstall it.




