| Microsoft-Windows-NetworkController/Operational | 12000 | Information | Network Controller service started successfully |
| Microsoft-Windows-NetworkController/Operational | 12001 | Warning | Network Controller service stopped |
| Microsoft-Windows-NetworkController/Operational | 12010 | Error | Failed to start due to configuration or dependency issue |
| Microsoft-Windows-NetworkController/Operational | 12011 | Warning | Node lost communication with another cluster node |
| Microsoft-Windows-NetworkController/Operational | 12020 | Information | Health check succeeded |
| Microsoft-Windows-NetworkController/Operational | 12021 | Error | Health check failed |
| Microsoft-Windows-NetworkController/Operational | 12030 | Information | REST API request received |
| Microsoft-Windows-NetworkController/Operational | 12031 | Error | REST API authentication failed |
| Microsoft-Windows-NetworkController/Operational | 12040 | Information | Policy deployment initiated |
| Microsoft-Windows-NetworkController/Operational | 12041 | Error | Policy deployment failed on one or more nodes |
| Microsoft-Windows-NetworkController/Operational | 12042 | Information | Policy deployment completed successfully |
| Microsoft-Windows-NetworkController/Operational | 12050 | Information | Database replication completed |
| Microsoft-Windows-NetworkController/Operational | 12051 | Error | Database replication failed |
| Microsoft-Windows-NetworkController/Operational | 12060 | Information | Certificate validation succeeded for network node |
| Microsoft-Windows-NetworkController/Operational | 12061 | Error | Certificate validation failed — node rejected |
| Microsoft-Windows-NetworkController/Operational | 12070 | Warning | Host Agent heartbeat lost (vSwitch / SLB) |
| Microsoft-Windows-NetworkController/Operational | 12071 | Information | Host Agent heartbeat restored |
| Microsoft-Windows-NetworkController/Operational | 12080 | Information | Gateway connection established |
| Microsoft-Windows-NetworkController/Operational | 12081 | Warning | Gateway connection lost |
| System | 7036 | Information | Network Controller service entered running/stopped state |
| System | 7031 | Error | Network Controller service terminated unexpectedly |
| Microsoft-Windows-NetworkController/Operational | 1001 | Critical | Controller node communication failure |
| Microsoft-Windows-NetworkController/Operational | 1003 | High | Configuration synchronization error |
| Microsoft-Windows-NetworkController/Operational | 2001 | High | Policy deployment failed |
| Microsoft-Windows-NetworkController/Operational | 2006 | High | Network virtualization mapping error |
| Microsoft-Windows-SDNPlatform/Operational | 4501 | Medium | Virtual switch policy conflict |