SharePoint Online - Issue opening PDF's in Desktop app

[Softboy159]

Hi all

I have been trying to troubleshoot the issue of opening PDF files via SharePoit using the desktop app. I have searched high and low but have not come across a permanenet solution. One of the strangest things is that some users can open PDF files via Adobe Acrobat without issues, while others cannot and it seems to open via the web browser as default, here is a list of everything I have done to troubleshoot this issue:

1. Changed the settings in SharePoint for all documents to open using the desktop app

2. Acrobat has been changed as the default PDF handler in Windows 11

3. Removed Enable Protected Mode at startup in Acrobat

4. Enabled Adobe Acrobat for Microsoft 365 for the whole organisation via Integrated apps

4.1 Once this had been depolyed this had a mixed bag of results, some users could open PDF's on the web via Adobe but when trying to open it using the open in desktop button we were met with the error: There was an error opening the document, The file name, directory name or volume lable syntax is incorrect

4.2 I tried different browsers such as Chrome, Edge and Firefox and was again met with mixed results some opened in Acrobat on the web and some just opened in the browser, I have tried to check the settings in the browsers still had issues

5. Raised a ticket with Microsoft support and after doing their investigation they had advised to Enable Apps that don't use modern authentication (We will not allow this die to securty concerns)

Does anyone have anything else I could try to get this running consistently?

Thanks

[Meenakshi Negi]

Hi Softboy159,

Thank you for reaching out, and sorry to hear about your experience.

Please confirm whether you are trying to open the PDF using the in-app SharePoint option. Do you get any error messages? 

If you can share the screen recording, it would be helpful to understand the issue better.

Please do share the Acrobat and OS version numbers currently in use. 

Thanks,

Meenakshi

[Softboy159]

Hi Meenakshi

Please see the release version on one machine where it works fine: 

I have attached the clip for where it works

Please see screenshots of the step by step when trying to open a PDF that does not work:

I have the following options when trying to open a PDF:

Open in App does nothing

Open in Adobe Acrobat opens the document in the web using the Adobe plug-in

If I select the button Desktop then it gives this message:

If then click on open now I get the following message:

This was done on a re-built laptop and am still getting this error, The Adobe version locally:

[Softboy159]

Hi Adobe

Any update on this issue?

It's been 2 months since we have heard anything!