Hi,
We have 2 company under same AD forest and same Exchange 2010 organization, with different email domain.
Now 1 company is going to setup a new AD forest and Exchange 2019 organization in new location and separated network.
Assume the new AD forest and Exchange 2019 organization is up and running, how to make the old Exchange 2010 organization send/receive email to/from the new exchange though internet just like send/receive email to/from the rest of the world?
Just remove the accepted domain from the Exchange 2010 organization?
what happen if some mailbox or mail group still have the email domain in the Exchange 2010 organization?
Thanks.
Roy