James,
I agree that the new multi-threaded mailbox move feature in E2K3 is great. It save a considerable amount of time and increases a customer's ability to rapidly migrate from legacy mail systems. I also know that it is possible to increase the number of threads to 16 via a registry setting (that I won't post here).
Outside of telling me that this is "not a supported" scenario, what are your thoughts on the matter? I was wondering if any testing has been done, and if so, what were the results of those tests? Does MS intend to increase the number of threads in future versions of Exchange and or minor service pack revisions. Please let me know and lend me your thoughts on the matter. Thank you.
John