Administrators and users can edit activity alerts they created from the Edit User Alert screen.
To edit an activity alert, click Account from the Navigation bar and select Alerts in the subnav.

Select My Alerts tab

Click the Edit
icon next to the activity alert you want to modify.

The Edit Activity Alert screen is displayed.

Depending on your user type will depend on the fields you can modify.
Make the necessary changes to the Edit Activity Alert screen. For detailed information, see Creating an Activity Alert.
Click Submit.
The Alert updated successfully message is displayed in the My Alerts tab.