Microsoft 365 tenants can select any of the verified domains for the tenant to send Microsoft 365 service messages instead of using the default domains. The update also allows tenants to choose a routable recipient (username) instead of the traditional “no-reply” address. Overall, this seems like a very easy change to implement that shouldn’t cause any problems.
https://office365itpros.com/2023/04/13/microsoft-365-service-messages/
