One of my customers has a Hybrid scenario of email integration with Dynamics 365 On Premise and Exchange Online. The Dynamics 365 On Premise has multiple organizations and he was using Email Router to connect it to Exchange On Premise earlier.
Since they have moved from Exchange On Premise to Exchange Online, and with the deprecation of Email Router, they are required to start using the Server Side Integration for Email Integration needs.
However, the Server Side Integration of the Email System only allows one Dynamics 365 Organization to connect to an Exchange instance and does not support multiple organizations.
It would be great if we can provide a capability of the server side sync to support multiple organizations (especially in a hybrid scenario) as leveraging Power Automate sometimes is a but cumbersome and involves a bit of effort.