From the customer detail page -
Select the Work Order
In the Work Order detail page, select the calendar & select a new date
Confirm the date change
When you return to the customer details, the stop will now be listed as Unassigned. Make sure to route the stop.
From the Route Manager -
Select the Work Order details
In the Work Order detail page, select the calendar & select a new date
Confirm the date change
The unassigned Work Order will be under the Unassigned Column in the Route Manager