Windows error 5045 (ERROR_CLUSTER_NETWORK_NOT

Status / error code:		Category:

Constant name:
Source:	Operating System:
Description: The requested cluster network could not be found.

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ERROR_CLUSTER_NETWORK_EXISTS	ERROR_CLUSTER_NETINTERFACE_EXISTS

ERROR_CLUSTER_NETWORK_NOT_FOUND

The referenced network does not exist in the cluster view. The physical adapter can still exist, so verify network discovery and interface state instead of assuming that the NIC must be reinstalled.

What to check

Compare the expected subnet and adapter with the networks and interfaces discovered by the cluster.
Check whether the adapter is disabled, disconnected, excluded, or has an address that no longer matches the expected network.
Use a fresh cluster log and validation report when the network disappeared during a membership change.

Get-ClusterNetwork; Get-ClusterNetworkInterface

Microsoft: Get-ClusterNetwork

Microsoft: Get-ClusterNetworkInterface

Microsoft: Test-Cluster

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