Please find below the steps to cancel the orders in bulk in WMS 3.0-
Step1: Go to Orders Module and select the orders which you wish to cancel from the tick box.
Step2: Click on Actions button and select Bulk Order Cancel button.
Step4: Enter the reason due to which the orders are being cancelled.
Note: User can select a maximum of 10 orders for Bulk Cancellation at a time.
Hope this helps!