We currently have domain on a subnet. The organization I work with, is opening a new company called domainB. What is the best method when using dcpromo to create a domain called domainB. These two domains must also use the same exchange 2010 server. domainA users have user@domainA.com as an email. domainB users need to have user@domainB.com.
What option is best to create this while selecting the options in dcpromo.
Also, do I need to do a two-way trust so when I create an email address policy I can view domainB?