We are looking at a situation where we want users in two separate organizations to use the same primary SMTP domain. The Exchange servers (2013 and 2016) are on-prem for both.
The implicit send connector for internal mail, as I understand it, would pick up all email sent to addresses on our internal domain and try to deliver it internally, except that in this case users in the other organization will not have a mailbox in our environment. Instead, we want emails send from one environment to the other to be sent through an external send connector rather than the internal, as external routing will know what to do with them.
Any recommendations on how we could set up a rule/connector/etc to accomplish this? We could identify the list of email addresses that would apply to the other organization and not the local one.
