If you get the above error while syncing a document to QuickBooks Online:Login to ProcureDesk.Open the document.Go to Actions.Click on Send for Integration.Related ArticlesBusiness Validation Error: Select an account for this transaction.Authentication FailedBusiness Validation Error: Select an account for this transaction.QuickBooks Online PO Sync Error - PurchaseOrder has to be enabled in SettingsAuthorization FailureAuthorization Failure: Unknown error during Authentication, status code: 500