Merge pull request #223573 from frantran/patch-1

Update faq.md

Author: prmerger-automator[bot]

articles/kubernetes-fleet/faq.md

@@ -45,6 +45,17 @@ The current preview of Azure Kubernetes Fleet Manager resource supports joining
 
 Azure Kubernetes Fleet Manager resource is a regional resource. Support for region failover for disaster recovery use cases is in the [roadmap](https://aka.ms/fleet/roadmap).
 
+## What happens when the user changes the cluster identity of a joined cluster?
+Changing the identity of a member AKS cluster will break the communication between fleet and that member cluster. While the member agent will use the new identity to communicate with the fleet cluster, fleet still needs to be made aware of this new identity. To achieve this, run the following command:
+
+```azurecli
+az fleet member create \
+    --resource-group ${GROUP} \
+    --fleet-name ${FLEET} \
+    --name ${MEMBER_NAME} \
+    --member-cluster-id ${MEMBER_CLUSTER_ID}
+```  
+
 ## Roadmap
 
 The roadmap for Azure Kubernetes Fleet Manager resource is available [here](https://aka.ms/fleet/roadmap).