i have an organisation with 5 exchange 2007 server (hub, cas and mailkbox) and 8 exhcange 2013 server (mailbox+CAS).
i installed a new server with exchange 2007 with role (mailbox and cas) to host a few pop3 mailbox user.
when i test email from user on exchange 2013 to one use on this new server, the email stuck on queue with:
There is currently no route to the mailbox database
any help plz?