Updating the Adobe Acrobat Pro DC Version Installed with the Adobe Experience Manager Server
  
Updating the Adobe Acrobat Pro DC Version Installed with the Adobe Experience Manager Server
Follow this procedure to manually update Adobe Acrobat Pro DC on the AEM server.
1. First carry out these checks:
a. Verify the MS Office support notes for the old and new versions of Acrobat on the Adobe web site.
b. The MS Office PDF Generator (PDFG) plugin is sensitive to the Adobe Acrobat Pro DC and MS Office version combination. Ensure that there are no known-issues with your configuration and the version you want to update to.
c. Follow these steps to verify that your test and production AEM server environments are working correctly:
a. Launch Microsoft Word on the AEM server using the Windows account of the PDF Generator, and then open a Word document and confirm that the Acrobat ribbon is available.
b. Click Create PDF on the Acrobat ribbon to exercise the PDF conversion using the PDFG plugin.
c. Publish a document from AEM server's adminui > Create PDF to ensure that the service is not broken.
d. Perform the Adobe Acrobat Pro DC update in your AEM server test environment first and perform the above verification steps there, before deploying in production.
2. From Windows Task Manager, under Services, select JBoss service and click Stop Service. Ensure that the java.exe process of JBoss goes away.
3. From the Windows Registry, change Acrobat Policy to Allow Product Updates:
a. Paste the following lines into a text editor, and then save the file as AcrobatEnableUpdates.reg.
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Adobe\Adobe Acrobat\2017\
FeatureLockDown]  "bUpdater"=dword:00000001 
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Adobe\Adobe Acrobat\2017\
FeatureLockDown\cServices] "bUpdater"=dword:00000000
b. Ensure that no version of Adobe Acrobat is running, and then double-click the AcrobatEnableUpdates.reg registry file and add the entries to the Windows Registry.
* 
Always practice extreme caution when making modifications in the registry.
It is recommended to make a copy of the registry key so the original settings can be restored if needed.
The registry should only be edited by a qualified system administrator.
PTC is not responsible for system malfunction caused by the application of this solution.
4. Open Windows Explorer and navigate to C:\Program Files (x86)\Adobe\Acrobat 2017\Acrobat\ to launch Acrobat.exe
5. Change the Update preference to not update Acrobat automatically:
a. Click Edit > Preferences, and under Categories select Updater.
b. Clear Automatically install updates.
c. Click OK, to save.
6. Set the SYSTEM environment variable Acrobat_PATH to point to Acrobat.exe, for example, C:\Program Files (x86)\Adobe\Acrobat 2017\Acrobat\Acrobat.exe.
7. From Acrobat's Help, initiate Check for Updates > Manual Update to install and update the Acrobat Pro DC with latest version.
8. The Update successful box appears. Click Close.
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Dismiss all Acrobat dialog boxes that are displayed after the Acrobat installation is completed.
Disable the automatic updates for Acrobat.
9. After the Adobe Acrobat update, perform these steps:
a. Ensure that the Acrobat_PATH SYSTEM environment variable is set, for example, Acrobat_PATH=C:\Program Files (x86)\Adobe\Acrobat 2017\Acrobat\Acrobat.exe.
b. Launch a Command Prompt in elevated mode, for example, Run as administrator.
c. Navigate to the C:\Adobe\Adobe_Experience_Manager_Forms\pdfg_config and execute Acrobat_for_PDFG_Configuration.bat.
d. Restart the JBoss server.
10. Perform the following checks:
a. Launch Microsoft Word and open a document.
b. Check that the Acrobat ribbon is activated.
c. Click Create PDF, and confirm that the PDF is generated.
d. Publish a document from the AEM server's adminui using Create PDF to ensure that the service is not broken.
See Article - CS290508 for more details.