I've run ExFolders (Sp1, etc) on Exchange 2010 on MULTIPLE servers and I've never run into this issue.
Upon expanding the mailbox folder I see "Error: Logged-on user does not have FullAccess to this Mailbox"
I'm logged in as Domain Admin (same as I have on all the other servers).. I'm running ExFolders SP1+ on Exchange 2010 SP2 (as I have on many other servers).. I've imported the SVN Reg.. I've also explicitly given the Domain Admin FullAccess to a few mailboxes to test, same issue.
I suspect this is an exchange permissions issue, not specific to ExFolders.
Can anyone point me in the right direction?