I know there have been a few threads on this, but many seem to be pre-5 and I thought I'd check in. I'm moving our BES service account mailbox from it's old Exchange 2007 mailbox server to an Exchange 2010 mailbox server.
All our activated users are already on this 2010 mailbox server.
It seems the process is just to stop services, update the MAPI profile, and start them again.
This article covers a number of scenarios, none that are an exact match, however.
Any gotchas people have come across?