The company I work for is having an issue with users racking up huge data bills with iOS hotspot tethering. Is there a way we can push a profile that will disable this feature? I have looked through the iPhone Configuration Utility and cannot find any settings for this feature.
As of iOS 9.2, there is no way to disable the Personal Hotspot feature through Configuration Profiles.
The best you can do at the moment is to use an MDM server to report on the status of the Personal Hotspot feature and manually instruct users to switch it off, or arrange to disable it through your carrier.
This is not quite what the OP is looking for because their question is coming from a business context, but for those who may be interested in this question for parental control related reasons: I think when Qustudio is set up using a VPN as instructed in the link below a side effect is that tethering is effectively disabled (you can still start tethering and connect devices but those connected devices will not have any internet access via the tethering).
https://www.qustodio.com/pt/help/article/2076783/ (Note: I think the use of a Supervised phone setup in the link may not be necessary, probably any way of setting Qustudio up on ios would work. Though this is probably the most robust setup)
If you can't find an option in iPCU, it seems that there probably isn't a way to disable the Personal Hotspot feature. Is there any way that you could cancel the tethering option with your carrier? (If you are unaware, carriers provide tethering as an option that can be disabled/enabled at carrier level at free will.)