Update title and add error code

Author: Clare Zheng (Shanghai Wicresoft Co Ltd)

articles/data-factory/connector-mongodb.md

@@ -251,7 +251,7 @@ To achieve such schema-agnostic copy, skip the "structure" (also called *schema*
 
 To copy data from MongoDB to tabular sink or reversed, refer to [schema mapping](copy-activity-schema-and-type-mapping.md#schema-mapping).
 
-## Upgrade the MongoDB linked service to the latest version
+## Upgrade the MongoDB linked service
 
 Here are steps that help you upgrade your linked service and related queries:
 

articles/data-factory/connector-troubleshoot-mongodb.md

@@ -30,14 +30,15 @@ This article provides suggestions to troubleshoot common problems with the Mongo
 
 ## Migrate to the new version of MongoDB Connector
 
-- **Message**:
-    `The legacy MongoDB connector has been deprecated. To ensure your pipeline works, please create a new MongoDB linked service. Detailed instructions can be found in this documentation: https://learn.microsoft.com/azure/data-factory/connector-mongodb?tabs=data-factory#upgrade-the-mongodb-linked-service-to-the-latest-version`
+- **Symptoms**: You meet the following error code and error message:
+    - **Error code**: `DeprecatedMongoDbOdbcConnector`
+    - **Error message**: `The legacy MongoDB connector has been deprecated. To ensure your pipeline works, please create a new MongoDB linked service. Detailed instructions can be found in this documentation: https://learn.microsoft.com/azure/data-factory/connector-mongodb?tabs=data-factory#upgrade-the-mongodb-linked-service`
 
 - **Cause**: 
     Your pipeline is still running on a legacy MongoDB connector that causes the error. 
 
 - **Resolution**: 
-    Upgrade your MongoDB linked service to the latest version. Refer to this [article](connector-mongodb.md#upgrade-the-mongodb-linked-service-to-the-latest-version).
+    Upgrade your MongoDB linked service to the latest version. Refer to this [article](connector-mongodb.md#upgrade-the-mongodb-linked-service).
 
 ## Next steps