As far as I know, iOS 12.3 has yet to be released officially. Yet, in my environment, I have over 22 devices (mix of employee and corporate owned) with iOS 12.3 installed. Is anyone else seeing the same in his/her environment?
We have two devices and they belong to some technicians that always like to test the next beta version. Anyone can sign up for an Apple Beta Software account and get the beta versions to test. https://beta.apple.com/sp/betaprogram/
Rich and Luke, thank you both for the info. I will probably create a compliance policy and separately educate users not to install Beta software on their corporate devices.
If you look in profiles you should be able to see the beta profile, if you block profile installation on supervised (which is highly advisable, not just for this) they will not be able to enroll in the beta
Do you gather all profile data for personal devices in privacy settings? restrictions profile - Allow manual profile installation requires supervision blocks the profile (only new ones not existing)