I recently installed SF Runtime v6.1.480.9494. Then today tried adding secondary certificate using Add-AzureRmServiceFabricClusterCertificate. However, it adds bad certificate with Intended purposes 'Client Authentication' only!!
This causes failing to authenticate to Service Fabric Explorer, so unable to login to Service Fabric Explorer anymore.
PS Module AzureRm.ServiceFabric version is 0.3.4