Log in to the HTML5 client.
If you want to delete Lessons Learned:
At the Project level, open the Project Card from the Projects Center workspace, and then select the Library Items tab, Lessons Learned sub-tab.
At the Portfolio level, select a portfolio folder in the selector, and then select the Lessons Learned tab available in the Portfolio Work Management workspace.
At the Work Package level, select a work package in the selector, and then select the Lessons Learned tab available in the Work Package Work Management workspace.
Select the Inbox mode ().
Select a Lesson Learned in the Lessons Learned List panel.
In the Lessons Learned Details view, click on the More () button and select the Delete command.