Is it possible to completely disable the camera functionality so that taking any sort of picture using any app is impossible?
Yes, you can. But you must be running Windows Phone 8.1 update 2 inorder to do that.
If you are running Windows Phone 8.1 update 2,
- Go to Settings.
- Click on App Permissions.
- Open Camera.
- Turn it off.
If you join your Windows 10 Mobile (or 8.1) device to Azure Active Directory (AAD) you can apply a policy to the device (or all company devices) that disables the camera.
Unless you are in the defence industry and your users are onsite on military bases then this is a rather draconian policy. Even most military installations do not disable cameras (was onsite at Dobbs Air force base) and mealy create the expectation that you will be shot if seen taking pictures of anything...
If you disable cameras then how will your users:
- submit receipts
- Scan whiteboards