We are planing the migration of On-premise Domino Server mail system to Office365. I would like to know that Is it possible to configure Smarthost in Domino Server to route mail to office365.
Assumption is when a email address is not in Domino local domain it should route to the Smarthost .
Plan is to keep the MX record Point to On-premise Domino Server and create a secondary MX record of Office365. Then remove the user email address from domino and keep the mail box of old emails and create the same user in office365. When an email receives on Domino and if the address is not found,it route the message to the smarthost which is Ofiice365.
So that we can have a stage migration by picking up the users in a batch and slowly migrate to office365 for entire user without having a cutover migration.
If this is not possible how we can have a stage migration of Domino to office365