Reader DC | Fatal Error | Acrobat failed to connect to a DDE Server

[MichaelIntrinsiQ]

We are getting sporadic errors of:

Fatal Error

Acrobat failed to connect to a DDE server.

I have found other topics on this forum and unfortunately they all state to:

• Update HKEY_CLASSES_ROOT\acrobat\shell\open\ddeexec\application from AcroViewA19 to AcroViewR19 | Completed
• Disable Anti-Virus | Not Completed (Out of Security Policy)
• Open Task Manager and end all Acrobat Processes | Not Feasible (Terminal Server farm of over 60 machines load balancing 1,000+ users)
• Fatal error - Acrobat failed to connect to a DDE server  | Why does Acrobat fail to connect to DDE Server & give FATAL ERROR.

I have not seen an answer where the reporting user has come back confirming that the issue has been fixed.  I did find in one string, that a user suggested to turn of JavaScript for Reader but no reply after that.  Acrobat failed to connect to a DDE server

Has anyone found the correct answer to this?  As you can imagine, it is very frustrating to our end users with this error.  Below is our current setup and what we have done to mitigate other errors in Reader.  Does anyone have any first-hand experience with disabling JavaScript and resolution of this error?  Does anyone have a solid solution to resolve this DDE error?

Adobe Reader Version: 2019.012.20035

RdrCEF Version: 2019.012.20035

OS: Windows Server 2012 R2 64-bit

Registry settings:

• [HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Policies\Adobe\Acrobat Reader\DC\FeatureLockDown]

"bEnableProtectedModeAppContainer"=dword:00000000

• [HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Policies\Adobe\Acrobat Reader\DC\FeatureLockDown\cIPM]

"bShowMsgAtLaunch"=dword:00000000

"bDontShowMsgWhenViewingDoc"=dword:00000000