Sending, receiving, and organizing email in Outlook.com
No success yet to Microsoft.
https://x.com/MSFT365Status/status/2121079061774491735
We’ve monitored the status of the changes applied to improve serviceability and confirmed they're not taking as expected. We’re identifying alternate workstreams that can be applied to increase capacity in the face of sustained traffic management imbalances. More info under EX1550543 and MO1550821 in the Microsoft 365 admin center, as well as https://msft.it/6013xBHsf if the admin center is not available to you.