We are in the middle of a Migration from Exchange 2003 to 2010 to 2013.
2003 is no more. After moving 3 mailboxes to the 2013 Servers, we are not able to send mails with them.
We have 3 Locations (1 Root and 2 subdomains)
Domain a.de (root)
Subdomain b.a.de
Subdomain c.a.de
a.de is able to send to the subdomains, but b and c are not.
If a user in c trys to send an internal mail to a or b, the mail Returns with:
Remote Server returned '550 5.7.1 Not authorized
The same happens from b to c or a
We are working with Microsoft Support on that. We have been told to execute "Setup /preparealldomains" in all Domains.
Does this make any sense? The execution fails in b and c as there is a third subdomain d.a.de which cannot be reached from the sites b and c. (no ip Routing to b and c but a, no Exchange site planned in d)
(hope that i haven´t convused too much....)
