You are the billing manager for a company that has recently subscribed to Microsoft 365. Your responsibilities include managing the subscription licenses, updating payment methods, viewing and downloading invoices, and modifying billing frequencies. Your organization prefers a flexible billing model where you are charged based on actual usage rather than a fixed cost. Additionally, you want to ensure that the relevant team members receive automated billing notifications and renewal reminders. Which billing account type and pricing model would be most suitable for your needs?