Ok, so looking through the wiki and forum and see both being used. Looking at the documentation there is no mention of a preferred tool.
We are a small municipality with less than 200 email accounts, some with years of emails, all in Exchange 2010 (which is is killing us and stealing our souls). Looking at the planning of the migration I have to ask, why imapsync and the migration wizard? Is there a different purpose for each?
We need to plan our migration to be quick and as painless as possible, we do not have the people or resources to stage this out. Everyone loses email for a weekend is fine, if we are completely done by Monday morning.
Which should we use?