Hi,
we have 4 exchange 2010 servers, 2 mailbox and 2 hubcas. we are migration to 4 exchange 2013 servers, 2 mailbox and 2 hubcas.
exchange 2013 user can send and receive emails from/to internet without problems, but when i try to send email to internal users located to 2010 server i have no success.
i also can receive from exchange 2010, so the problem is only i cannot sent emails to exchange 2010 users.
is this a problem with receive connector of exchange 2010 or something else ???