Use AppendBlob

Use AppendBlob http://twocents.nl/?p=2734

To use AppendBlob we will have to write a custom function. Logic Apps don’t have a standard connector for AppendBlob. AppendBlob actually adds a record to the current blob. That way you won’t have to use a singleton. One thing, you will have to create a separate function for blob creation and call that once. Only the AppendBlob function will be called multiple times in a loop. Otherwise you will once again loose input records.