Despite careful setup, you may encounter problems. Here is the definitive diagnostic guide.
If you continue to experience issues with v2.5.1 and Java on Windows 10, it is worth noting that Ubiquiti has transitioned away from this standalone PC tool. ubnt discovery tool v2.5.1 and java on windows 10
(for large deployments > 200 devices): Launch via batch script: Despite careful setup, you may encounter problems
Remove any newer versions of Java (JDK 11+, or modern JRE 8 updates beyond 281) from your system. Install Legacy JRE: Download and install a legacy version like JRE 8 Update 271 from a reputable archive. Execute the JAR: Locate your ubnt-discovery-v2.5.1.jar (for large deployments > 200 devices): Launch via
where the tool opens but cannot detect devices, often due to Windows Firewall or VLAN mismatches. Installation and Setup Requirements
The is a legacy utility used to discover Ubiquiti devices (airMAX, UniFi, EdgeMAX, etc.) on a local Layer 2 network, even if they have IP address conflicts or are on a different subnet. Version 2.5.1 is one of the final standalone releases before Ubiquiti integrated discovery features into the UniFi Network Controller and EdgeOS.