The Exchange Online High-Volume Email (HVE) solution handles up to 100,000 internal messages and 2,000 external messages daily. It’s intended to replace on-premises Exchange servers that organizations keep just to service email submission from devices and applications. In this review of the preview version, we discovered that almost everything works just fine, if you keep within the throttling limits.

https://practical365.com/exchange-online-hve/

​The Exchange Online High-Volume Email (HVE) solution handles up to 100,000 internal messages and 2,000 external messages daily. It’s intended to replace on-premises Exchange servers that organizations keep just to service email submission from devices and applications. In this review of the preview version, we discovered that almost everything works just fine, if you keep within the throttling limits.
 
https://practical365.com/exchange-online-hve/  Read More

​