I've noticed a strange behavior with IMAP in Outlook 2013.
If I move Mail from my Inbox to another IMAP folder the Mail Headers were killed. Our Mail-Server is inserting some special X-Headers, which are used by our self-coded Outlook AddIn. Works great in Outlook 2007 and Outlook 2010. It also works in Outlook 2013, but if we move the Mail to another folder (or to Sent Items, or to Trash), the Mail Headers are removed by Outlook during transfer.
I assume this is not an intended feature of OL 2013, looks like a bug :-) !
I also noticed that OL 2013 IMAP sync fails from time to time. Deleted Mails (moved to Trash and then deleted in Trash) show up again if my IMAP Inbox folder if I connect with OL 2010 from another machine. That's really bad for a RTM version.
Please tell me how I can contact the Outlook Dev-Team to file bug reports for these 2 bugs.