I am preparing to migrate from Exchange 2003 sp2 to 2013 and I must to communicate the two servers.
email from 2013 to 2003 works.
Email From 2003 to 2013 does not work.
(Exchange 2003 have a dns , Exchnage 2013 have another dns server in the same lan)
I created, in dns of exchange 2003, an MX record for the email to the mydomain.net that point to exchange 2013 mail.mydomain.net -> ipeofExchange2013
If I do a nslookup from 2003 it is not solved the mx record ... and I do not understand why you help me?
I get a message like this
https://technet.microsoft.com/it-it/library/aa998966(v=exchg.65).aspx
thanks !
oasis in my heart