I've configured SMS over SMTP for ClearPass guest and I am able to send both email receipt and test SMS. However, during the guest self registration process, the SMS fails with the following error:
Client: 10.29.120.157:64182
App User: admin
Script: /guest/guest_register_receipt.php
Function: NwaSmsSendMessage
Arguments: array (
'rtn' => array (
'error' => 1,
'message' => '2002|Account does not have SMS access.',