How to Fix SharePoint Review Comment Errors in Adobe Acrobat
Question details
Adobe Acrobat fails to retrieve or publish shared review comments from SharePoint Online and displays a server response error.
- Product
- Adobe Acrobat
- Device & OS
- Windows
- Scenario
- Accessing or publishing shared review comments hosted on SharePoint Online.
- Observed behavior
- Acrobat throws a server response error and cannot synchronize comments, even though other users can successfully access the shared review.
Before making changes to the Windows Registry, ensure you have administrative privileges and consider creating a system restore point to prevent accidental system issues.
Update Acrobat and Apply Registry Fix
Resolve the SharePoint connection error by ensuring Acrobat is updated and disabling HTTP2 for SharePoint domains in the Windows Registry.
This solution forces Adobe Acrobat to bypass HTTP2 protocols when communicating with SharePoint Online, resolving synchronization timeouts and server errors.
Open Acrobat and go to Help > Check for Updates. Ensure you are running version 19.010.20091 or later, then close the application completely.
Open Task Manager (Ctrl + Shift + Esc), locate 'AdobeCollabSync.exe', select it, and click 'End task'.
Press the Windows key + R, type 'regedit' in the Run dialog, and press Enter to launch the Registry Editor.
Go to the following path: HKEY_CURRENT_USER\Software\Adobe\Adobe Synchronizer\DC.
Right-click in the right pane, select New > String Value (REG_SZ), and name it 'tdisableHTTP2List'.
Double-click 'tdisableHTTP2List', type '*.sharepoint.com' in the Value data field, click OK, and restart your computer.
Repair the Adobe Acrobat Installation
Use the built-in repair tool to fix missing or corrupted application files that may be blocking the synchronization process.
Use WPS Office for Hassle-Free PDF Collaboration
If Adobe Acrobat's server synchronization continues to disrupt your workflow, consider switching to WPS Office. It provides a lightweight, free alternative with robust PDF viewing, commenting, and editing features, free from complex registry errors.
- 1. Download WPS Office: Visit the official WPS website and download the free WPS Office installer.
- 2. Install the Software: Run the downloaded file and follow the quick setup instructions to install.
- 3. Open and Edit PDFs: Launch WPS Office, open your PDF file, and use the 'Comment' tab to annotate and share without server errors.
Frequently Asked Questions
Why does Acrobat show a server response error when accessing SharePoint?
This error generally occurs due to HTTP/2 compatibility issues between Adobe Acrobat's background synchronization process and SharePoint Online. Disabling HTTP2 for SharePoint in the Windows registry forces a stable connection and usually resolves the communication breakdown.
What is AdobeCollabSync.exe and why do I need to close it?
AdobeCollabSync.exe is a background process responsible for synchronizing shared reviews and comments in Acrobat. Ending this process ensures that any stuck or pending synchronization attempts are completely stopped before you apply the registry fix.
Can I retrieve my review comments if the server sync continuously fails?
Yes. If Acrobat fails to sync, the comments might still exist on the SharePoint server. Accessing the file directly through a web browser or repairing your Acrobat installation will often let you access the previously submitted comments.
