Open either Mozilla Firefox or Chrome. (Sending messages does NOT work in Internet Explorer.)
Login to Infinite Campus. Be sure you’re in “Campus Instruction” not Campus Tools”. (It will say “Campus Instruction” in the left portion of the green bar at the top.)
Select what type of message (class, grades, missing assignments), where it’s sent (user’s IC Inbox or Email or both), any change of date/time.
Select who receives the message (see below)
Type in your subject and message.
Clicking “Next” on this screen SENDS THE MESSAGE.