There is currently a limitation of 100k records even using this new API call. If your organization has more devices than this and you need to export all records at once, please submit a new case (Help > Open Case at the top of all pages in the User Exchange) requesting an increase. Without using the above API calls there is a hard limit of 5k rows per call built into the API even using pagination parameters, and a maximum of 15k records can be returned. You can also use the CSV Export button on the Enrollment page to export up to 10k records at once.