Add proper LongPath support
Adobe fails to open files when a file path & name exceed MAX_PATH. Windows no longer has a hard path character limit if the LongPathsEnabled key is set in the registry. See https://docs.microsoft.com/en-us/windows/desktop/fileio/naming-a-file#maximum-path-length-limitation
Modern applications are adopting this new standard with the mentioned file management hooks provided by the OS.
Adobe is falling behind in this regard. Please add proper Long Path support.

We are currently reviewing the request for LongPath support and will update the thread.
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Korey Mendes commented
Has this been implemented yet?
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Shaun commented
This is a major issue with OneDrive and SharePoint.
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Peter Verginer commented
Its a pain working with sharepoint and onedrive sync and having to copy pdfs to the desktop to open them.
We are also investigating moving to foxit only because of this everyday-problem! -
Carl commented
Not on the known issue list.
https://helpx.adobe.com/uk/acrobat/kb/known-issues-acrobat-dc-reader.html
Until they acknowledge it there get the feeling we will be waiting a very long time for fix!!!
Adobe Reader product team can we ********* the known issue list for starters?
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Cristiano Rodrigues commented
Any updates on this @Vinod?
We have clients on Adobe subscriptions that we'll move to Foxit if this doesn't get sorted soon.
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Jim Kramer commented
For the money Adobe charges for Acrobat this should not be a "thing". Come on Adobe... get your act together.
STILL NOT FIXED!!!!!
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Jason Stuff commented
Kind of ridiculous at this point. "Currently reviewing"? How long does it take to review? Apparently 3+ years. It's not as simple as reducing file name length, many networks are locked into long file tree paths. More importantly, we shouldn't have to change file paths/lengths, this is an issue that should be fixed by Adobe.
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Magnolia Xenia commented
Any updates regarding this request? It's been more than 2 years. This issue is still a headache for everyone in the business.
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Anonymous commented
How is still a problem, you have has almost 2 years since the bug report regarding this issue was posted. Come on adobe, you are better than this
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Anonymous commented
The issue continues to persist as I'm finding out after getting Adobe for my organization. Any update on the resolution?
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Peter Verginer commented
Any progress on this? We have serious problems in the whole company because of this!
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test commented
And ? You are still in progress ?????
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nz commented
I don't think Adobe gives a rats *** about this issue. I'm paying $200 a yr subscription service for a **** software that a much cheaper version can take care of. Time to go with the competitor.
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Anonymous commented
12 Months since you noted it as under review. Any updates yet?? This is insane!
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asdf commented
long paths work fine with Free PDF-XChange Viewer
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SHaun commented
is there an update? in 2020 and this is still a dang issue.
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Anonymous commented
I could not believe that adobe does not have compatibility with this.... It sould like really easy to fix! And it is still under reviewing (facepalm)...
The only solution is to disable the startup protection...
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Benjamin Groves commented
For whatever absurd reason, Adobe Reader Touch does open long path files without a problem
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Carl commented
I have found partial workaround (Requires Windows 10)
Solves part of my issue with long paths in OneDrive synced folders. At least now I can get to the pdf although I now get this message to which I just choose skip to: The source and destination filenames are the same.Be interested to know if below fixes the issue for others?
1. Enabled long path support in Windows and reboot.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem
LongPathsEnabled=12. Disable Protected Mode in Adobe Reader DC.
Menu : Edit \ Preferences \ Security (Enhanced) - Untick Protected Mode.
Exit Adobe Reader for changes to take effect. -
Anonymous commented
Definitely needed feature! Please implement using proper libraries to enable long path support.