Managers: Once you've scheduled or created a huddle; the reps in your team are automatically set to participate in the huddle.  If you want any users that are not in your team to participate in the huddle, pleaes follow these directions.

Step 1:  Navigate to your Huddle

Step 2: On the "Start Here" page of your huddle, "Enter Attendee Name", then click "Add to Huddle" for the user to participate in the huddle.