Specify the following information in the Zuora Connection section:
https://apisandbox.zuora.com/apps(for a Sandbox environment) or
https://www.zuora.com/apps(for a Production environment). This field is pre-populated with the URL of the Zuora Web Service Site from which you are logged into Zuora.
Specify the following information in the NetSuite Connection section:
Sandbox. Use the Beta Prerelease for testing only new NetSuite releases as needed.
Enable Multithreading (Concurrent user sessions): Enabling multithreading for NetSuite Create and Update commands allows for faster processing. Choose Yes if you have a SuiteCloud Plus License from NetSuite and your integration user has Concurrent Sessions enabled. Contact NetSuite to add this license if desired. Leave this selected No if you don't know what NetSuite license you have.
If you do not have a SuiteCloud Plus License or the Integration User does not have Concurrent Sessions enabled, errors will occur during the sync process.