how can I uninstall the MDM app

how can I uninstall the MDM app

Hi,

I've enrolled some devices in my test env but now I need to enroll them to another prod env.
I've un-enrolled a device in the test env, but on the device, the MDM app is still running and cann't be stopped or uninstalled.

What can I do to solve the problem please?
                New to ADManager Plus?

                  New to ADSelfService Plus?