What is the easiest way to check for any unassigned Tasks?

You can quickly identify unassigned work by using the ‘Group By’ feature:

• On the right side of the ‘Plan header’, click the ‘Group by’ filter.
• Select ‘Assignee’.
• Tasks without a member assigned will be displayed under the ‘Unassigned’ column. (Note: The default view is ‘Group By Status’).