IPAM actively scans the network and if it detects any duplicate static IP assignments or duplicate IP provisioning from a DHCP server, it will trigger an event. It will also detect if there is more than one MAC address using the same IP Address within the same network.
The event information will display the IP Address, subnet and MAC addresses that are in conflict.
Alerts can be tracked via alert/message center in IPAM. Any alerts/events will appear in the IP Address Summary page Last XX Events section.
You can see the device & port of the machines connected with the User Device Tracker integration. From there you can decide to shut the port down if needed.
For more information about UDT & IPAM troubleshooting an issue see IP Address Conflicts.