I am running BES 3.6 SP2 on Exchange 5.5 and NT4 domain. We are in the final stages of migrating users from NT4 to Win2003 AD. Next we need to migrate the BES service account from NT4 to AD. This is a migration, not an in-place upgrade. Shortly after this migration, the Exchange 5.5 mailbox will also be moved to Exchange 2003. This whole time, we plan on keeping the same BES server. What is the best process to use so that we do not lose any information or have to re-cradle the blackberry devices?
I have seen a lot of info on BES 2.1, but I need some information specific to 3.6.