I have researched this question, I have found a lot of posts, but none that are exactly like my situation.
So here goes:
I have one domain, several DC's and one exchange server. Our company recently sold, I am staying with old owners and rest of the IT staff is going with the new company. The new company is taking over 75% of employees. I am keeping the domain name, but new company will own all of the servers at split time.
I want to rebuild the domain from scratch, however, my main concern is downtime on email. I am not sure that I can migrate 150 users over a weekend to a new domain by myself. I would prefer a slower more methodical way to do this.
Here is my proposed solution.
Create a new domain, build a trust with old domain, have a secondary exchange server buit as if I were doing the swing technique to upgrade server hardware on the exchange box. Then bring the new exchange server over to the new domain.
If someone has a better solution please let me know, or if you believe this will not work. Thanks