104. Can partner community users use SMS-Magic Converse and, if so, what permissions do they need?

Yes. SMS-Magic Works with partner community user of Salesforce. You can give the users “SMS-Magic Converse User” Permission Set and grant access to the Visualforce pages for Conversation View.
Refer to the section on SMS-Magic Converse Permission Details in the SMS-Magic Converse Guide for Salesforce Admin for more details on assigning permissions in SMS-Magic Converse.