First, navigate to the History page in the Fax menu:
The far left column of each fax will show the status of that fax:
A green check mark means the fax was successful.
A red "X" means the fax failed.
A spinning yellow arrow means processing.
A watch means the fax was scheduled:
Users can setup email notifications for both inbound and outbound faxes that will notify them for both successful and failed faxes. These notifications can eliminate the need for users to manually check fax status in the application.