Bulk Data API ExecuteMultipleRequest in UR12
The ExecuteMultipleRequest message was added to the December 2012 Service Update (UR12) in CRM Online and CRM On-Premise, which accepts a collection of message requests, executes them in the order of the input collection and can return a collection of responses that contain the response for each message that occurred or if an error occurred. The CRM SDK version 5.0.13 is required to use the ExecuteMultipleRequest.