All signed-in users can add posts to community topics. Only Help Center managers can edit and delete posts by default.
A Help Center manager can allow agents (including light agents) to edit or delete posts in select community topics. This permission is granted at the topic level and must be set topic by topic.
For more information about overall Help Center permissions, see About Help Center roles and setting permissions.
You must be a Help Center manager to grant this permission.
To enable agents to edit or delete articles in a topic