FIX Problem security with Adobe Reader WIN10
No reaction when trying to open a .pdf file from a network share available under DFS with a previously running .pdf document locally.
The problem with .pdf files not working properly in correlation with DFS is the Adobe Reader application bug.Bug exist from begin od 2018.Adobe products cannot cope with distributed file systems.The observed bug occurs in WIN SRV 2016 and 2019 systems, and unless it is explicitly stated anywhere that the reason is the change in the SMB authentication method, this is indicated by (logically) the AR logs.this is a link to a thread on this topic https://community.adobe.com/t5/acrobat-reader/can-only-open-1-pdf-at-a-time-from-dfs-server/m-p/10889532?page=3#M62593 The bug only occurs in Adobe applications, previous signals about Edge / other browsers have not been confirmed in tests. .Pdf documents in other applications work correctly at the moment.The workaround is to disable protected mode in Adobe Reader but our security department does not recommend such a solution
AdminShakti K (Admin, Adobe) commented
Sorry for the inconvenience caused.
Fix is available with Aug 2020 update. Please update to latest update i.e 2020.012.20041. It should resolve the issue.
Let me know for any further issues.