I currently have two domains (let's call them domainA.com and domainB.com) which seperate trees within the same forest.
I need to be able to setup one exchange server (which is already part of domainA.com) for users of both domains.
I know I can receive email for two different domains on one exchange server but I am struggling to provide access to users of domainB.com to the exchange server using any information I can find on this site and microsoft. I have tried to associate an external account but obviously can't because they are part of the same domain.
Can anyone please provide a solution to setting up the users on domainB.com.