We have two primary domains that are business related and all users in the organisation have an email address for, e.g. Bob has email addresses email@example.com and firstname.lastname@example.org. This has been set up in the default recipient policy and works fine.
However, I have purchased another domain name that is being used purely as a test project. I have set the MX record to point mail sent to this address to our Exchange Box.
I plan to assign SMTP addresses from the new test domain to specific users via AD e.g. email@example.com. How do I set the recipient policies so that new users are not automatically generated an email on the test domain when added to AD?
In summary, I want our exchange server to be responsible for handling @testdomain emails - but only for specifically chosen users to have an address on this domain?