To enable your Authorize.net account within Service Fusion, please follow these steps:
1. In Service Fusion, go to My Office > Settings > Payment Gateway Settings, click Add New and select Authorize.net from the list of gateways.
2. Sign into your Authorize.net payment gateway account at https://account.authorize.net/
3. Once signed in, go to the ACCOUNT tab
4. In the Security Settings select API Credentials & Keys
4. Copy your API Login ID from Authoriz.Net.
5. Paste it into the API Key field in Service Fusion.
6. If this is your first time setting up this gateway, you will need to generate a new Transaction Key in the "Create New Key(s)" section
7. Copy the generated Transaction Key
8. Paste this key into the Service Fusion payment gateway settings Transaction Key input field