A number of people have noted this is a problem and yet nowhere do I see Microsoft admitting this is a problem let alone providing a fix.
The problem is simple. After an email is sent, the draft copy of the email should be removed. It isn't. The message will stay there in my drafts folder. I would be happy to unsync the Drafts folder so that they're only stored on my local machine. But I get the message that the folder can not be unsync'ed as it's a special folder.
It would be nice if MS would at least acknowledge this problem. I've seen enough reports to believe this is a real issue.
I just bought Outlook 2013 thinking it would solve some of the 2007 problems I had. I'm seriously thinking of going back to 2007. This hardly appears to be an improvement in versions.