There is an Add button in Learning History Tile on the learning plan of users which allows users to record learning events.
Learning Management System
This Add button is controlled by a user workflow. Navigate to System Admin > Security > Role Management > Search for the user Role > Go to Work flows, and remove the workflow "Access Record Learning Events" which is under the group Learning.
After Removing this you will see that "Add" button is removed from the Learning History Tile.
Learning History Tile Add Add Button , KBA , LOD-SF-LMS , SuccessFactors Learning , Problem