SSRS not connecting to Oracle DB using Encrypted connection (Oracle NNE)

Hi,

We have setup Oracle NNE on our DB's to encryot our sessions. this is working fine for all connections except those coming from reportingservices.exe.

I can SQLplus to the oracle db from the SSRS server and it connects using encryption but when setting up a datasource in the SSRS web console and testing it only connects using non exncrypted connection.

I have tried updating the machine.config file on the SSRS server but i dont think this is the right config file.

DB side I have this in SQLNET.ora:

SQLNET.ENCRYPTION_CLIENT=REQUESTED

SQLNET.ENCRYPTION_SERVER=REQUESTED

SQLNET.ENCRYPTION_TYPES_CLIENT=(AES256,AES192,AES128)

SQLNET.ENCRYPTION_TYPES_SERVER=(AES256,AES192,AES128)

SSRS Server side I have this in machine.config file:

<oracle.manageddataaccess.client>

<version number="*">

  <settings>

<setting name="tns_admin" value="e:\oraclebase\product\12.1.0\client\network\admin" />

   	<setting name="SQLNET.ENCRYPTION_CLIENT" value="REQUIRED" />

<setting name="SQLNET.ENCRYPTION_TYPES_CLIENT" value="AES256,AES192,AES128" />

<setting name="SQLNET.ENCRYPTION_SERVER" value="REQUIRED" />

<setting name="SQLNET.ENCRYPTION_TYPES_SERVER" value="AES256,AES192,AES128" />

  </settings>

</version>

</oracle.manageddataaccess.client>

Datrasource is defined as Oracle Database:

DATA SOURCE=(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = foaukl1npdb-swdo8-scan.emea.hays.loc)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = iepp_service.otchukl1npexcl.otchukl1npvcn01.oraclevcn.com)))

There must be a config file I am missing somewhere on the SSRS side that will tell the connections to use NNE? ANy idea where that is?