Minotr fixes to custom logs

Author: bwren

articles/azure-monitor/logs/custom-logs-overview.md

@@ -11,8 +11,13 @@ With the DCR based custom logs API in Azure Monitor, you can send data to a Log
 
 [!INCLUDE [Sign up for preview](../../../includes/azure-monitor-custom-logs-signup.md)]
 
+> [!NOTE]
+> See [Migrate from Data Collector API and custom fields-enabled tables to DCR-based custom logs](custom-logs-migrate.md) to migrate solutions from the [Data Collector API](data-collector-api.md).
+
 > [!NOTE]
 > The custom logs API should not be confused with [custom logs](../agents/data-sources-custom-logs.md) data source with the legacy Log Analytics agent.
+
+
 ## Basic operation
 Your application sends data to a [data collection endpoint](../essentials/data-collection-endpoint-overview.md) which is a unique connection point for your subscription. The payload of your API call includes the source data formatted in JSON. The call specifies a [data collection rule](../essentials/data-collection-rule-overview.md) that understands the format of the source data, potentially filters and transforms it for the target table, and then directs it to a specific table in a specific workspace. You can modify the target table and workspace by modifying the data collection rule without any change to the REST API call or source data.
 
@@ -46,6 +51,9 @@ The endpoint URI uses the following format, where the `Data Collection Endpoint`
 {Data Collection Endpoint URI}/dataCollectionRules/{DCR Immutable ID}/streams/{Stream Name}?api-version=2021-11-01-preview
 ```
 
+> [!NOTE]
+> You can retrieve the immutable ID from the JSON view of the DCR. See [Collect information from DCR](tutorial-custom-logs.md#collect-information-from-dcr).
+
 ### Headers
 The call can use the following headers:
 

articles/azure-monitor/logs/ingestion-time-transformations.md

@@ -38,7 +38,7 @@ See the following tutorials for a complete walkthrough of configuring ingestion-
 
 ## Limits
 
-- Transformation queries use a subset of KQL. See [Supported KSQL features](../essentials/data-collection-rule-transformations.md#supported-kql-features) for details.
+- Transformation queries use a subset of KQL. See [Supported KQL features](../essentials/data-collection-rule-transformations.md#supported-kql-features) for details.
 
 ## Next steps