Capabilities/moodle/site:readallmessages
From MoodleDocs
moodle/site:readallmessages allows a user to read all messages in the given context.
Note: This documentation is for Moodle 2.7. For up-to-date documentation see Capabilities/moodle/site:readallmessages.
moodle/site:readallmessages allows a user to read all messages in the given context.