You may be able to use Conversations to send a message to all users in a course, all users in a specific role, or all users in a group.
If your recipient list contains more than 100 users, your message will automatically be sent as individual messages to each user.
- Messaging all users is a course permission. If you cannot send a message to all users, your institution has restricted this feature.
- Once your course has concluded, you cannot send a message to all users.
- Users display in Conversations once they have an active enrollment in the course, and users cannot join a course unless it is published.
In the course drop-down menu , select the course where you want to send a message .
Open Address Book
Click the Address Book icon.
Select User Role
To send a message to all members with a specific user role, click the name of that role  and then click the link for all users with that role .
In the subject field, add a subject for your message . If you do not want everyone to see all recipients and replies in the message, click the Send an individual message to each recipient checkbox . Type your message in the message field . You can also add attachments to your message . Click the Send button  when you are finished.
Note: If your recipient list contains more than 100 users, the Send an individual message checkbox will be selected automatically, and your message will be sent as individual messages to each user.
Your message will appear at the top of your Sent folder. When someone replies to your message, the message will be shown in the Inbox.
Note: You can reply to the recipient or reply-all to everyone in the class.