Unable to disable automatic updates...

Hi Community,

we installed CC 2017 with Acrobat on Mac OSX 10.12.6 (Sierra) and are unable to disable automatic updates within the applications preferences. We need to disable it, because this workstation is running in an Internet restricted department  and if Acrobat is searching for updates on each launch, the application is inaccessible, until the Updater is running in it's timeout. The procedure to disable automatic updates was a working fix for the last versions of Acrobat.

This setting is in the application preferences dialog and there is a checkbox to disable automatic updates when unchecked. But the checkbox will activate itself instantly without any possibility for us to keep it in an unchecked state. We will be asked for administrator credentials for installing a mystery helper program, but after entering the credentials the dialog disappears and the checkbox is activated again.

Can anyone give us a hint how we can setup Acrobat CC either to disable automatic updates or to get it running without issues in an Internet restricted department?

Thx & Bye Tom