Follow the steps below to update the name of an existing Account List:
- Go to Account Lists under the 'Audiences' tab
- Click on the Account List
- Click on Manage List and select 'Edit List'
- You will be directed to a List Preview page, now click on 'Continue'
- A dialog box will be prompted, enter the new name and click on 'Save & Continue'
- Click Continue and 'Save Changes'.