How do I add new people to an existing conversation as a student?
You can add people to an existing thread in the Inbox.
If your recipient list contains more than 100 users, your message will automatically be sent as individual messages to each user.
Note: When adding users to an existing conversation, you cannot change the course or the subject line.
In Global Navigation, click the Inbox link.
In the Inbox filter, select an existing conversation.
Start to type a name in the text field , or click the Address Book icon  to filter by users or course groups.
Use Address Book
Locate the individual and select his or her name . Names are sorted by last name.
To navigate back to the address book, click the Address Book button .
To exit the course roster menu, press Return (on a MAC keyboard) or Enter (on a PC keyboard).
Verify you added the correct person.
Enter a reply in the text field . Then click the Send button .