You can find unassigned work in your account separated out by Job or by Task

To find unassigned work by job, navigate to your Jobs tab and then use your manager filter to find all jobs that currently do not have a manager assigned. You can also see which jobs have tasks unassigned by using the staff filter.

After you've identified unassigned work, you can mass edit the jobs by selecting the jobs on the far right with their check mark box, clicking the actions button at the top of the list and then selecting update manager.

To find unassigned work by Task, navigate to your task subtab of your Jobs tab. You can then use the 'Assigned To' filter on the left to select unassigned and view tasks that are not assigned to any team member.

Once you've filtered to your unassigned tasks, you can assign them in bulk by selecting tasks on the far right side using their corresponding check mark boxes and then using the paper/pen icon at the top of the screen to make mass edits.