I have a server 2012 R2 that refuses to show in the Automox console under Devices. I have uninstalled the agent and reinstalled and received an email alert that a new device was added to Automox but I can’t find it anywhere in the console.
I think it might be worth emailing support to see if they can see it at their end.
Otherwise, you could check the amagent service is running and check the amagent.log for problems. I know Automox does work with 2012 R2 (or at least it used to).