Merge pull request #123536 from JoeyC-Dev/patch-1

Add section of modifying appGw settings in application-gateway-faq.yml

Author: ShannonLeavitt

articles/application-gateway/application-gateway-faq.yml

@@ -570,6 +570,12 @@ sections:
           To satisfy this `Ingress` resource, an ingress controller is required, which listens for any changes to `Ingress` resources and configures the load balancer policies.
           
           The Application Gateway Ingress Controller (AGIC) allows [Application Gateway](https://azure.microsoft.com/services/application-gateway/) to be used as the ingress for an [Azure Kubernetes Service](https://azure.microsoft.com/services/kubernetes-service/), also known as an AKS cluster.
+
+      - question: Can I configure Application Gateway directly instead of using ingress controller?
+        answer: |
+          Direct configuration of Application Gateway isn't supported.
+          
+          If there is a need to change settings on Application Gateway, make the change by using the exposed configuration on the ingress controller or other Kubernetes objects, such as by using supported annotations. After an Application Gateway is linked to Application Gateway Ingress Controller (AGIC), nearly all configuration of that gateway will be synced and controlled by the ingress controller. If you're trying to directly configure Application Gateway imperatively or through infrastructure as code, those changes will eventually be overwritten by the ingress controller. 
           
       - question: Can a single ingress controller instance manage multiple application gateways?
         answer: Currently, one instance of an ingress controller can only be associated to one application gateway.