To see what cases are shared with a specific user or need to be reassigned or closed:
Go to LawToolBox in your outlook add-in, Teams or app.lawtoolbox.com
Reports > Click "All reports" > Matter Sharing Report > Select user > Run report > Email or download the report
Step by step:
Go to Reports
Change the report type by clicking on the "All reports"
Select Matter Sharing Report
Run the report:
Email or download