To edit or delete existing rules in Outlook, follow these steps:
Open Outlook and go to the "File" tab.
Select "Manage Rules & Alerts" from the dropdown menu.
In the "Rules and Alerts" window, you will see a list of your existing rules.
To edit a rule, select it and click on "Change Rule" to modify the conditions or actions.
To delete a rule, select it and click on "Delete."
Confirm your changes by clicking "OK" or "Apply."