Merge branch 'patricka-dataflow-mq-release-aio-m2' of https://github.com/PatAltimore/azure-docs-pr into patricka-dataflow-mq-release-aio-m2

Author: PatAltimore

articles/iot-operations/connect-to-cloud/howto-configure-fabric-endpoint.md

@@ -92,6 +92,7 @@ This Bicep template file from [Bicep File for Microsoft Fabric OneLake dataflow
 ```azurecli
 az stack group create --name MyDeploymentStack --resource-group $RESOURCE_GROUP --template-file /workspaces/explore-iot-operations/<filename>.bicep --action-on-unmanage 'deleteResources' --deny-settings-mode 'none' --yes
 ```
+
 This endpoint is the destination for the dataflow that receives messages to Fabric OneLake.
 
 ```bicep
@@ -247,6 +248,12 @@ resource dataflow_onelake 'Microsoft.IoTOperations/instances/dataflowProfiles/da
 }
 ```
 
+The `BuiltInTransformation` in this Bicep file transforms the data flowing through the dataflow pipeline. It applies a pass-through operation, mapping all input fields `(inputs: array('*'))` directly to the output `(output: '*')`, without altering the data. 
+
+It also references the defined OPC-UA schema to ensure the data is structured according to the OPC UA protocol. The transformation then serializes the data in Delta format (or Parquet if specified).
+
+This step ensures that the data adheres to the required schema and format before being sent to the destination.
+
 ---
 
 For more information about dataflow destination settings, see [Create a dataflow](howto-create-dataflow.md).
@@ -298,10 +305,10 @@ fabricOneLakeSettings:
 fabricOneLakeSettings: {
       authentication: {
         method: 'SystemAssignedManagedIdentity'
-        systemAssignedManagedIdentitySettings: {}
+        systemAssignedManagedIdentitySettings: {
+            audience: 'https://contoso.onelake.dfs.fabric.microsoft.com'
+        }
       }
-      oneLakePathType: 'Tables'
-      host: 'https://msit-onelake.dfs.fabric.microsoft.com'
       ...
     }
 ```
@@ -378,6 +385,10 @@ fabricOneLakeSettings:
 
 # [Bicep](#tab/bicep)
 
+The bicep file has the values in the dataflow endpoint resource.
+
+<!-- TODO  Add a way for users to override the file with values using the az stack group command >
+
 ```bicep
 batching: {
   latencySeconds: 5