Tokenization in Authorize.net
Authorize.net can send tokens to Salesforce however it's done with their Customer Information Management (CIM). You would enable CIM through your Authorize.net account by logging into Authorize.net, selecting Tools, and choose in the left column Customer Information Management. Follow Authorize.net setup instructions to enable tokenization.
You can also contact Authorize.net to have them setup CIM for you.
From within your Salesforce Org, you want to do the following.
- Click on the App Launcher
- Locate and select Gateways
- Click on your Authorize.net Gateway name and click Edit
- Check the box that says Tokenization
- Click Save