How can I view out of stock items in SellerExpress?

If you want an export from SellerExpress that contains all out of stock products the simplest way to get this is to go to the reports menu and to generate a "Stock Import File" report.

You can then take this report into Excel and sort by quantity.

This is also useful if you wish to re-order some of these items as you can update the report you just produced with stock quantities and then import it back into SellerExpress.