We are upgrading from the 201109 API to the 201209 one. The 201109 one could run a report and get data back for any client under an Adwords Account (MMC included).
Now, I get an error of "CUSTOMER_SERVING_TYPE_REPORT_MISMATCH" with version 201209. https://developers.google.com/adwords/api/docs/troubleshooting?hl=en#ReportDefinitionError.CUSTOMER_SERVING_TYPE_REPORT_MISMATCH
Can anyone shed light as to why you can no longer generate a report (and how to fix) using ReportDefinitionService for clients under an MMC account?