1. When setting up the Gateway choose Authorize.net as the Record Type
2. Use the same mapping for credentials as Authorize.net except using your Gateways credentials
- a) Merchant ID = API Login ID
- b) Merchant Security Key = Transaction Key
3. Set the Endpoint Override to match the Gateways API Endpoint for processing payments
4. Add the Endpoint to the Remote Site Settings in Salesforce
You may need to contact your gateway to obtain the endpoint override URL.