Add note and fix links in manage-azure-rbac.md

Add note to remind those who depends on Azure portal that the role is not directly viewable via Azure portal (recommend to use CLI).  
  
Fix the links which are not jumping to the section of the page due to false anchor usage.

Author: JoeyC-Dev

articles/aks/manage-azure-rbac.md

@@ -103,6 +103,13 @@ az role assignment create --role "Azure Kubernetes Service RBAC Admin" --assigne
 > az role assignment create --role "Azure Kubernetes Service RBAC Reader" --assignee <AAD-ENTITY-ID> --scope $AKS_ID/namespaces/<namespace-name>
 > ```
 
+> [!NOTE]
+> After creating role assignments scoped to a desired namespace, you won't be able to see it in "role assignments" under "Access control (IAM)" in the Azure portal. You can find it by using the [`az role assignment list`][az-role-assignment-list] command.
+>
+ ```azurecli-interactive
+> az role assignment list --scope $AKS_ID/namespaces/<namespace-name>
+> ```
+
 ## Create custom roles definitions
 
 The following example custom role definition allows a user to only read deployments and nothing else. For the full list of possible actions, see [Microsoft.ContainerService operations](../role-based-access-control/resource-provider-operations.md#microsoftcontainerservice).
@@ -215,19 +222,20 @@ To learn more about AKS authentication, authorization, Kubernetes RBAC, and Azur
 <!-- LINKS - Internal -->
 [aks-support-policies]: support-policies.md
 [aks-faq]: faq.md
-[az-extension-add]: /cli/azure/extension#az_extension_add
-[az-extension-update]: /cli/azure/extension#az_extension_update
-[az-feature-list]: /cli/azure/feature#az_feature_list
-[az-feature-register]: /cli/azure/feature#az_feature_register
-[az-aks-install-cli]: /cli/azure/aks#az_aks_install_cli
-[az-aks-create]: /cli/azure/aks#az_aks_create
-[az-aks-show]: /cli/azure/aks#az_aks_show
-[az-role-assignment-create]: /cli/azure/role/assignment#az_role_assignment_create
-[az-provider-register]: /cli/azure/provider#az_provider_register
-[az-group-create]: /cli/azure/group#az_group_create
-[az-aks-update]: /cli/azure/aks#az_aks_update
+[az-extension-add]: /cli/azure/extension#az-extension-add
+[az-extension-update]: /cli/azure/extension#az-extension-update
+[az-feature-list]: /cli/azure/feature#az-feature-list
+[az-feature-register]: /cli/azure/feature#az-feature-register
+[az-aks-install-cli]: /cli/azure/aks#az-aks-install-cli
+[az-aks-create]: /cli/azure/aks#az-aks-create
+[az-aks-show]: /cli/azure/aks#az-aks-show
+[az-role-assignment-create]: /cli/azure/role/assignment#az-role-assignment-create
+[az-role-assignment-list]: /cli/azure/role/assignment#az-role-assignment-list
+[az-provider-register]: /cli/azure/provider#az-provider-register
+[az-group-create]: /cli/azure/group#az-group-create
+[az-aks-update]: /cli/azure/aks#az-aks-update
 [managed-aad]: ./managed-azure-ad.md
 [install-azure-cli]: /cli/azure/install-azure-cli
-[az-role-definition-create]: /cli/azure/role/definition#az_role_definition_create
-[az-aks-get-credentials]: /cli/azure/aks#az_aks_get-credentials
+[az-role-definition-create]: /cli/azure/role/definition#az-role-definition-create
+[az-aks-get-credentials]: /cli/azure/aks#az-aks-get-credentials
 [kubernetes-rbac]: /azure/aks/concepts-identity#azure-rbac-for-kubernetes-authorization