Unable to disable automatic updates on Mac

[pronto007]

Hi Community,

we try to setup a Macintosh workstation (10.12) in an Internet restricted department with some Adobe CC applications and in Acrobat Pro DC  (and all other version before) we have to disable the automatic updates to prevent application hang ups because no update server could be reached. In Acrobat Pro DC the necessary setting in the application preferences should be the last point 'Updater' with a checkbox to enable installing updates automatically. But each time I try to disable this checkbox the system consistently enabled it again. Is there a possibility to disable the automatic updates in the operating system preferences?

Thx in advance & Bye Tom