Special characters such as '#' and '%' are supported by SharePoint Online and SharePoint Server 2019 in the file and folder names but the Adobe SharePoint Integration uses a SharePoint API that is not special character-aware. If the integration is not disabled it will result in errors and unexpected behavior within Adobe when handling files whose paths contain special characters.
Adobe prompts if the SharePoint integration is not disabled
When opening a file with a special character in the name you will see the Check Out dialog
If you click on Check Out & Open you will receive the following message which prompts to download a copy of the file to your computer.
This behavior is not ideal because if you make changes to the file the save icon becomes greyed out and you have to use the save to SharePoint option in Adobe to re-upload the document and you will have to add the special characters back into the file name.
If you select the Open option instead of Check Out & Open the file will open without any other prompt and the save option will be available but if you click on the save icon you will get the following prompt
Clicking on Check Out & Save will result in an error
How to Disable the SharePoint integration in Adobe
To disable this message you must disable SharePoint Integration in Adobe using the following steps:
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Open the registry editor.
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Go to
HKLM\SOFTWARE\Policies\Adobe\<product name>\<version>\FeatureLockDown. -
Create a key called
cSharePoint. -
Create a DWORD value called
bDisableSharePointFeatures. -
Set its value to 1.
More Adobe articles:
Eliminating Prompts when opening PDFs from SharePoint using MacroView