A MSP would have many Accounts to whom service would be provided. An Account represents a customer account. The account configuration section would be used by the administrator to configure the account specific details
To access the Account configurations:
Login to the ServiceDesk Plus - MSP application with the Username and Password of a ServiceDesk Plus - MSP Administrator.
Click the Admin tab in the header pane.
With ServiceDesk Plus MSP 7.6 you could configure the account related settings for your own helpdesk as well. The configurations are available under Admin--> MSPDetails