I'm working on upgrading exchange 2003 to 2010 and ran into a small problem. I have several BES users (myself included) and when I migrated my mailbox to the 2010 server last night I found the BES service stopped working. From what I've read this is due to upgrades needed on the BES server to update the admin software, profile, and other items.
The problem is that when I moved my mailbox back to the 2003 server I am no longer able to use activesync on my Android phone. BES works and oddly enough I can send email with the Activesync connection but get an connection error when I try to sync. In the Exchange Management Console on the 2010 server when I look at mailbox features tab under my account properties Activesyc says "This feature only applies to exchange 2010 objects and above." Any ideas on what the problem might be with this one?