Message center notifications for service changes posted to the Microsoft 365 admin center will include monthly active user counts for affected workloads. That sounds good, until you realize some of the downloads incurred by depending on the Microsoft Graph Reports API as the source of user data. Still, it’s better than nothing and a welcome advance.
https://office365itpros.com/2022/01/20/microsoft-365-notifications-display-monthly-active-users/