Hi there!
In my network there are 2 mail servers: old based on linux: (oslinux.domain.com) and new one Exchange 2013 Server (let be in this example: mail.domain.com)
AS MX record already is configured domain: domain.com (points to oslinux.domain.com)
I'm moving all mailboxes from oslinux.domain.com to mail.domain.com but I have a large amount of users therefore I divided it into small parts.
I create all mailboxes on Exchange (from AD accounts) and modify external connector that all mails to: domain.com was routed to oslinux.domain.com, which decided if it will be forwarded to mail.domain.com (for configured real user mail client) or not (for not yet configured real user mail client) , and after a few probes discovered that all mails to <someone>@domain.com> was routed only for mails which are not exists on mail.domain.com ofcourse for external addresses also.
And my question here: How can I gain other flow? I want that all mails to <*@domain.com> was routed to external oslinux.domain.com - not delivered if mailboxes exist locally. Is it possible in Exchange 2013?
I dont want to delete of mailboxes on mail.domain.com
domain.com name is only used for this mail purpose ofcourse -)
With regards
Andr