Hi,
Is it possible to have a configuration where 50% of users are using Exchange On-Premise and the other 50% Exchange Online?
When setting up the Exchange Server Profile with the Impersonation User, do you then specify the individual mailbox addresses in the queues / Users you want to use from Exchange Server?
e.g. Email Server Profile = xyz@contsoso.com (impersonation user)
Queue 1 = Email: zzz@contoso.com
User 1 = Email: yyy@contoso.com
and all you do is use the credentials specified in the emails server profile?