You can create templates on any objects, standard or custom. However, prior to creating templates you will have to configure the objects in the Message Object Configuration under Converse Settings. You will need relevant permission to create custom objects. Ensure that all permissions are added to your user profile. Refer to the section on Add New Object under Message Configuration in the SMS-Magic Converse Guide for Salesforce Admin to know more about Message Object Configuration.

Once you have added the object, you can use it to create templates. Refer to the section on Create Converse Template in the SMS-Magic Converse Guide Salesforce Users.