Check for events that indicate non compatible devices -> CVE-2020-1472 EventID 5827 EventID 5828 EventID 5829 EventID 5830 EventID 5831
In August Microsoft patched CVE-2020-1472. With that patch theres a waiting period until 9th of february 2021 where unsecure connections will be accepted. With the patch on 9th of february unsecure clients will be rejected.
Script searches for the specific events on domain controllers to detect the unsecure devices.