I must migrate approx. 15 (existing) SBS 2003 servers, to 1 server. For the data, and the local users, there is no problem, but how do I migrate the exchange accounts.
Let's say it better. I must migrate it, so that the users notice almost no problems.
The new server is up and running, and the only problem that i'm facing now is, that when a (test) user on the new server sends an email to another user (in the same email domain), but which it's on the server yet, gets an error that the mail can't be delivered, because the user (of email) is not found on the local (new) server.
So I look for a solution, that during this migrate process (approx. 2 weeks) the mail flow works without almost no fallout.