Thanks for those screenshots. So it seems I was thrown by the frequent use of the word activate which occurs 17 tmes in this topic. I demonstrated that I can “activate” and “deactivate” (words used in my screenshots) MDM, but your fundamental problem from your screenshots is “Murena MDM has full access to your device” as you report in Post #10 of Samsung Galaxy S7 - This device is owned by your organization.
There is some repetition between threads but has anyone else reported or reproduced
Murena MDM has full access to your device
because this seems quite a lot different from “Activate MDM” as I had previously understood.