Hey Eric !
Take a look :
https://portal.smartertools.com/kb/a2724/migrate-smartermail-to-a-different-server.aspx
"SmarterTools makes it easy by allowing you to have 2 instances of your SmarterMail license running on 2 different servers for up to 30 days"
My question for you is about : "I will have both the old and new server running concurrently."
Your not talking about both receiving mail at the same time ? right ?
We just did something similar to your plan, but the new server started receiving email immediately. so we now have a week of mail that we need to somehow merge back into the older file structure. So my advice is to make sure the new one is not receiving mail at all and keep that for the old one. then move folders once the new machine is fully functional.
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