I have just moved my mailbox over to Exchange 2010 and now when I open Outlook 2010 my mailbox and archive show up twice, with different names. I can expand the archive folders and they are identical. I can only expand the first mailbox, the second says it is unavailable.
If I look in OWA they only appear once. And I have recreated my profile a few times, so I know it's not a corrupt profile. I have even deleted everything out of the Outlook Appdata folder as well as checked the registry entry under windows messaging subsystem to make sure the profile was removed there.
I have included a pic.