Fix Disabling AMI transfer

source/administrator/xivocc/install_and_config/phone_integration/index.rst

@@ -120,4 +120,15 @@ Conference with Yealink / Polycom
 Disabling AMI transfer
 ======================
 
-Since Polaris version, transfers are no longer done through the device capabilities or using DTMF but using AMI command to manage the device calls. If you want to revert to the old behavior you just need to set the ENABLE_AMI_TRANSFER to false in the docker custom.env file. Please check previous versions documentation for limitations.
+Since Polaris version, transfers are no longer done through the device capabilities or using DTMF but using AMI command to manage the device calls. If you want to revert to the old behavior you just need to set the ENABLE_AMI_TRANSFER to false in the `/etc/docker/compose/docker-xivocc.yml` file:
+
+.. code-block:: bash
+  :emphasize-lines: 5
+
+    xuc:
+      ...
+      environment:
+      ...
+      - ENABLE_AMI_TRANSFER=false
+
+Please check previous versions documentation for limitations.