When I try to delete or move a message, it seems like the connection to the Exchange server is lost and after a re-connection I get dozens of duplicate messages. Seems like moving or deleting messages is causing a loop, where app creates new set of duplicate messages each time. Weird. I have to manually remove them all from web panel.
Sending and receiving are working fine.
I'm using IMAP, Exchange protocol is set to Auto. Exchange 2010.