PDF Editing Issues

Fix File Excluded When Combining Documents in Adobe Acrobat

Muhammad TalhaMuhammad Talha Nov 3, 2026 869 views

Question details

The user is experiencing an issue where Adobe Acrobat excludes a single document when trying to combine multiple files.

Fix File Excluded When Combining Documents in Adobe Acrobat
Product
Adobe Acrobat
Device & OS
not provided
Scenario
Combining multiple files of different formats into a single PDF document.
Observed behavior
One specific document is omitted from the final combined file unless it is manually converted to a PDF first.
Before you start

Ensure you have the necessary passwords or permissions for the files you are trying to combine. Check that the file format of the excluded document is natively supported by your PDF editor.

Solution 1Recommended

Remove Password Protection or Encryption

Encrypted or password-protected files cannot be merged automatically. You need to remove the security settings first.

Adobe Acrobat skips files during the combining process if they are locked with a password or have strict permission settings preventing modification or conversion.

1
Open the Excluded File

Open the specific document that is being excluded in its native application (e.g., Microsoft Word, Excel) or Acrobat.

2
Enter the Password

Type the required password to view the document contents and unlock editing capabilities.

3
Remove Security Settings

Navigate to the file's security or protection settings and remove the password encryption. Save the unprotected file to your local drive.

4
Retry Combining

Go back to Adobe Acrobat and try combining the files again using the newly saved, unprotected document.

Remove Password Protection or Encryption
Permission Required: You must be the owner of the document or have the correct password to remove security restrictions.
Combine Files Seamlessly with WPS PDF

Use WPS Office to Combine Documents Without Errors

WPS Office provides a robust PDF toolset that easily merges multiple files and formats into a single PDF document. Avoid format exclusion errors and enjoy a smooth, lightweight PDF editing experience.

  1. 1. Open WPS PDF: Launch WPS Office and open the PDF tab, or select 'PDF Edit' from the homepage.
  2. 2. Select Merge PDF: Click on the 'Merge PDF' tool located in the main toolbar under the 'Page' or 'Tools' tab.
  3. 3. Add Files: Click 'Add Files' to select the documents you want to combine. You can add PDFs, Word documents, and images.
  4. 4. Start Merging: Arrange the files in your desired order by dragging them, then click the 'Merge' button to create your combined PDF.
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Frequently Asked Questions

Why does Adobe Acrobat skip some files when combining?

Acrobat typically skips files if they are password-protected, encrypted, corrupted, or in an unsupported format that restricts the software from automatically converting them into PDF during the merge.

Can I combine secured PDFs without knowing the password?

No, you cannot combine secured PDFs without authorization. You must know the password to open the file and remove the security restrictions before you can merge it with other documents.

What formats can be combined into a PDF?

Most standard formats like Word (.docx), Excel (.xlsx), PowerPoint (.pptx), images (JPG, PNG), and existing PDFs can be combined directly. If a specific format fails to merge, converting it to PDF manually first usually resolves the issue.