If you want to delete account for staff member, please visit list users sub menu under people main menu. All the accounts are listed on this page and you can delete any of them.
If you want to delete any account customer/supplier account, please visit list customers/suppliers sub menu under people main menu. All the customers/suppliers are listed on this page. Now click the users’ icon to list the account for the customer/supplier. On this window, you can delete any account for this customer/suppler.
If you delete any customer/supplier, all the account attached with the customer/supplier will automatically deleted.