Update the Zuora WSDL version and verify connections to synchronized Zuora entities.

1. In the Zuora Config tab, click Zuora Connection Settings.
2. Click Edit Settings .
3. Click Test Connection.
4. Check the connection status to all your Zuora entities.
   The entity information is synchronized from each Zuora entity in the Product Catalog sync. Test Connection only tests the connections to the entities that have been synchronized by the Product Catalog sync.