The Enrolling section can mean a few different things. It indicates that an employee has received an invitation to join Icon and has taken some action, but has not yet completed enrollment. This may include:
Clicking the invitation link but not completing sign-up.
Starting the setup process but not finishing all steps.
Creating an account but still needing to provide additional information to verify it.
Once an employee completes all required steps, they will move out of the Enrolling section and appear in your Pending Approvals.