diff --git a/en/docs/install-and-setup/configuring-identity-server-for-ob.md b/en/docs/install-and-setup/configuring-identity-server-for-ob.md
index c71a7e9..a4d1cc9 100644
--- a/en/docs/install-and-setup/configuring-identity-server-for-ob.md
+++ b/en/docs/install-and-setup/configuring-identity-server-for-ob.md
@@ -191,6 +191,14 @@ account retrieval. By default, this is disabled and the configuration is set to
     username="$ref{super_admin.username}@carbon.super"	
     password="$ref{super_admin.password}"	
     server_url = "{tcp://<SI_HOST>:7612}"	
+    ```
+
+16. When invoking any of the Identity Server endpoints, please ensure that a header named "X-External-Traffic" is included with the value "true" (both the header name and value are configurable as shown below). This header helps to distinguish external requests for accurate metric calculations. It is recommended to configure this header at the load balancer level for consistency.
+
+    ``` toml
+    [open_banking_cds.external_traffic]
+    header_name = "X-External-Traffic"
+    expected_value = "true"		
     ```   
 
 ## Starting servers
@@ -202,4 +210,4 @@ account retrieval. By default, this is disabled and the configuration is set to
     ``` bash
     ./wso2server.sh
     ``` 
-    
\ No newline at end of file
+