To deactivate a Standing Order without removing it completely, please follow the below steps.
Click the Admin Cogs.
Select Standing Orders and then Manage Standing Orders.
Locate the Standing Order you wish to amend.
To deactivate, click the Lightbulb icon.
Alternatively:
Click the Admin Cogs.
Select Standing Orders and then Manage Standing Orders.
Locate the Standing Order you wish to amend.
Click the Edit icon.
Scroll down to the bottom of the Details Tab.
Remove tick from Is Active box, and then click Update.