Capabilities/moodle/site:sendmessage
From MoodleDocs
- This allows a user to send instant messages to any other user
- This capability may only be applied in the system context
- The default Authenticated user role has this capability set to allow
Note: You are currently viewing documentation for Moodle 3.1. Up-to-date documentation for the latest stable version of Moodle is probably available here: Capabilities/moodle/site:sendmessage.