I tried all this before. In fact I tried an incredible number of things.
There is no way that I could find to add the following alias to a premium user ...
First Last" <first.last@domain.com>
... from the [Add Address] on SAC without having to add "domain.com" to the list of local domains first.
But if you add "domain.com" to the scalix server it now sucks in all emails to any user of the form user@domain.com, scalix already or not. That breaks the whole process. Even worst, on the scalix server you keep getting bounced emails telling you that nonscalixuser@domain.com doesn't exist, and often times they just go into a blackhole after being sent, and never make it to the main server or bounce a notification to the sender (probably a bug!).
Email between two Scalix users will stay on the Scalix server.
... that is not an option. I want to keep a copy of every inbound email to a Scalix user on the old server as well, for safety. Scalix users for now are being encouraged to cc themselves on all emails they send out just in case, and they still have the option to access the main server with our old friend SquirrelMail or Outlook/IMAP.
I'd like to find a solution for the calendar/notes issue on my previous scenario.
Thanks
Jaime