Other PDF Issues

How to Fix AdobeCollabSync.exe Preventing PDF Folder Deletion

Khadija KhanKhadija Khan Nov 3, 2026 869 views

Question details

Users cannot delete or rewrite PDF files or folders because the AdobeCollabSync process keeps the file handles open even after Acrobat is closed.

How to Fix AdobeCollabSync.exe Preventing PDF Folder Deletion
Product
Adobe Acrobat DC
Device & OS
Windows
Scenario
Attempting to delete or automatically regenerate PDF files and folders within a Windows environment.
Observed behavior
The system prevents deletion or rewriting of the PDF folder, displaying an access error because AdobeCollabSync.exe still has a locked handle on the file or folder.
Before you start

Ensure that you have closed all active Adobe Acrobat windows and saved your work before forcefully ending background processes in Task Manager.

Solution 1Recommended

End the AdobeCollabSync Process via Task Manager

Quickly force-close the background sync process to release the file lock and allow folder deletion.

1
Open Windows Task Manager

Press Ctrl + Shift + Esc on your keyboard, or right-click the taskbar and select Task Manager.

2
Locate the process

Navigate to the Details tab or Processes tab, and scroll down to find AdobeCollabSync.exe in the list.

3
End the task

Right-click on AdobeCollabSync.exe and select End task. This immediately releases the handle on your PDF files and folders.

End the AdobeCollabSync Process via Task Manager
Immediate Release: Ending this process will immediately allow your system or external programs to rewrite and delete the affected PDF files without restarting your PC.
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Frequently Asked Questions

What exactly does AdobeCollabSync.exe do?

It is a background service for Adobe Acrobat DC designed to sync document reviews and facilitate collaboration on cloud PDFs. However, it can inadvertently keep files locked even after closing the main application.

Can I use Windows Resource Monitor to find which file is locked?

Yes, you can open Windows Resource Monitor, go to the CPU tab, and type your PDF or folder name into the Associated Handles search box to confirm if AdobeCollabSync is the process locking it.

Will renaming AdobeCollabSync.exe break my Adobe Acrobat installation?

No, it will not break your core PDF reading or editing functionalities. However, it will disable Adobe's cloud collaboration and automatic background syncing features.

Why did AdobeCollabSync.exe return after I disabled it?

When Adobe Acrobat DC receives a software update, it often verifies its installation files and downloads a fresh copy of missing or modified components, restoring the AdobeCollabSync.exe file.