Cannot access SharePoint from latest version of Adobe Acrobat DC... again!

[vfwdit]

Seems accessing SharePoint has been broken in the latest Adobe Acrobat DC... again?

Using the open from Desktop link on a PDF inside of SharePoint 365 pops up with a prompt to sign into a storage connector.

Acknowleding this, Adobe pops up with a site name and URL entry and clicking continue always pops up with the attached invalid site error.

Even going to the "Add file storage" directly from Adobe Acrobat and inputting your SharePoint 365 URL directly will get the same error.

What's going on and when will this be fixed?

I remember this happened before and Adobe fixed something automatically on the backend and everything started working again.

Things to note:

1. Appears to be happening to all users.

2. Tried with full on site admin to SharePoint, same problem.

3. Confirmed happening on 25.001.20744 and 25.001.20693 versions of Adobe Acrobat DC.

4. Nuked temporary files and browser cache completely but no dice.

Thanks for any information you can provide!

[vfwdit]

Actually wasn't ALL users, just found out, and did more troubleshooting.

It seems it was a majority but we resolved it by doing the following:

1. Ending all Adobe processes and services

2. Clearing all Adobe Windows Credentials under Control Panel's "Credential Manager"

3. Clearing all of Adobe's user generated files from a user Command Prompt like so:

rd /s /q %appdata%\Adobe\Acrobat
rd /s /q %appdata%\Adobe\NGL
rd /s /q %localappdata%\Adobe\NGL
rd /s /q %localappdata%\Adobe\Acrobat
rd /s /q %localappdata%\Adobe\AcroCef
rd /s /q %localappdata%low\Adobe\Acrobat
rd /s /q %localappdata%low\Adobe\AcroCef

4. Opening Adobe again.

... Then all is well.   Pretty weird!  Not sure why all this was necessary, but now working for everyone again.

[vfwdit]

The solution I gave actually isn't a permanent solution.  The issue returns shortly after and has returned for us.

I don't know how to permanently solve this or why Adobe is acting like this.

If anyone has any ideas, please share them.

This is what happens:

1. You click the PDF in SharePoint.

2. It opens up to the document and in the address bar, we see the "https://documentcloud.adobe.com/spodintegration/index.html" with the document displayed.

3. We click the open in Desktop link at the upper right of the displayed document.

4. Adobe Acrobat pops up and says "You are trying to open a SharePoint file" and to configure a storage connector here to access file from the user's e-mail address.  Example: From "user@domain.com"

5. Clicking continue brings up a prompt to add a Microsoft SharePoint Account.

6. Putting in the SharePoint site results in an invalid site error.

[vfwdit · Accepted solution]

Talking to myself here, but doing this seems to have resolved the issue.  Found here: https://www.adobe.com/devnet-docs/acrobatetk/tools/AdminGuide/sharepoint.html

Disable Modern authentication OAuth 2.0

1. Open the registry.

2. Go to HKLM\SOFTWARE\Policies\Adobe\<product name>\<version>\FeatureLockDown

3. Create a DWORD value called bEnableSharepointModernAuth.

4. Set its value to 0.

I imagine this solution will only be good until legacy authentication support is removed from Adobe.  Not sure why Modern Authentication isn't working, though.  

Apparently Adobe is rolling it out in phases since last month.  See here: https://helpx.adobe.com/in/acrobat/using/access-sharepoint-files.html

It's not working for us, though.

[Hemarina]

Thanks! That worked for me too, my users don't have the problem anymore.

The only issue is that at some point very soon we need to be able to use modern authentification, it's a security requirement. Let's hope Adobe gets its act together

[vfwdit]

I have a meeting scheduled with an Adobe Senior Tech on Tuesday at 11:15am.  Hopefully something good will come from it.

[Vlad31949684l3q7]

We are facing the same issue in my organisation, do you have an update after today's meeting ?

Thank you for sharing the work around.

[Softboy159]

Thanks for all this, weirdly enough I am starting to get notifications about adding the SharePoint site URL to access my Adobe files which is locked down. If I then try and disable modern authentication I then get my original erros that I posted here: https://community.adobe.com/t5/acrobat-discussions/sharepoint-online-issue-opening-pdf-s-in-desktop-...

Can't win either way with, it either works or it doesn't for users, I had opened numerous cases with Adobe support and they say they will look into it and then close it off. I have taken it further with the Account Manager at Adobe becasue why not, if I am paying for a product I expect it to work as intended.

[vfwdit]

Forgot to update last week.

The Sr. Tech couldn't figure out the issue and has escalated it to the developers.

They've since followed up in 2 other e-mails stating they're still working on the issue and would get back to me soon.

That's all I've got.

[Enchanted_code8203]

Is there any further updates?

[stunning_magic6531]

Our client has had the issue with "Add file Storage" starting from the last update.  A heap of troubleshooting later, it turns out the only site with the issue is the primary site (https://blah.sharepoint.com/Documents". Adding a subsite seems to work fine.

I was curious, has anyone else found this to be the case where the primary site is the only one with the issue? I can't for the life of me find any different settings other than the fact it's the primary site...