I am a Lotus Notes Administrator trying to learn to be an Exchange/Outlook administrator. We are in the very earliest stages of moving to a hosted Exchange environment. So the gaps in my knowledge about Exchange rival the spaces between stars. My apologies in advance.
We have had a standard email domain: "na.abc.com" ("na" for "North America.") We also use "abc.com," and email to either one should reach any user in the organization, since "na.abc.com" is technically a sub-domain of "abc.com."
Now we have a subsidiary who would like email with their own brand: abcpro.com. This could potentially lead to abcpro.ca and abc.ca also wanting their own email addresses.
Costs, DNS and MX records aside, my questions are:
1) Can we have multiple email domains in a single Exchange/Active Directory system?
2) Since the users were formerly "na.abc.com," will they be able to get email to either "na.abc.com" or "abcpro.com" in the same mailfile? Can I keep it that way indefinitely?
3) Is there some simply (preferably automatic) way of making sure that the right people get into the right domains?
Don't worry about my level of knowledge in Exchange or Active Directory. I can learn anything. But right now, I'm having trouble just figuring out where to look, or even know if I'm asking the right questions.