Enter your app password to open the inbox.
Select a conversation, or start a new one.
Names must be unique, so you can text someone by name later.
The org's agents will be able to text this person and read their replies from now on. They won't see any earlier messages, and they won't see this person's name or number. Renaming the contact doesn't change this; hiding the number ends it.
Use a role, not their name: the agents see this label.
A contact name, or a number. US numbers assume +1; otherwise start with +.