Merge branch 'patch-1' of https://github.com/l3vin/azure-docs into mrb_10_25_2022_ma_PM_PR_fix

Author: mrbullwinkle

articles/applied-ai-services/metrics-advisor/how-tos/manage-data-feeds.md

@@ -47,12 +47,13 @@ Select the  **Backfill** button to trigger an immediate ingestion on a time-stam
 
 ## Manage permission of a data feed
 
-Workspace access is controlled by the Metrics Advisor resource, which uses Azure Active Directory for authentication. Another layer of permission control is applied to metric data.
+Azure operations can be divided into two categories - control plane and data plane. You use the control plane to manage resources in your subscription. You use the data plane to use capabilities exposed by your instance of a resource type.
+Metrics Advisor requires at least a 'Reader' role to use its capabilities, but cannot perform edit/delete action to the resource itself.
 
-Metrics Advisor lets you grant permissions to different groups of people on different data feeds. There are two types of roles: 
+Within Metrics Advisor there're another fine-grained roles enable permission control on specific entities, like data feeds, hooks, credentials... There are two types of roles:
 
-- **Administrator**: Has full permissions to manage a data feed, including modify and delete.
-- **Viewer**: Has access to a read-only view of the data feed.
+- **Administrator**: Has full permissions to manage a data feed, hook, creadential... including modify and delete.
+- **Viewer**: Has access to a read-only view of the data feed, hook, creadential...
 
 
 ## Advanced settings