Hi @Sanjeev Kumar ,
Thank you for posting query in Microsoft Q&A Platform.
Could you please share more details on your implementation and where exactly you are facing this error?
Are you making API call to quickbooks?
Are you using quickbooks connector in ADF?
Are you using Quickbooks dataset as source in Copy activity?
From error message it seems access related issue. If you have created linked service using quick books connector then kindly check is test connection is getting successful?
Kindly check is your client ID getting used for Quick book has all roles and permissions to make API call?