Step 1: Login to the course, click on Grades from the navigation bar across the top of the page.
Step 2: Click the Edit mode at the top right of the page.
Step 3: Click on the 3 dots next to the grade you want to Exclude, then click on Edit grade.
Step 4: Navigate to Final grade and place a check in the box to Exclude
Step 5: Optional Feedback, be sure to Save changes at the bottom of the page.