Sometimes I get new email in my Unread folder, under Search Folders, but not in my Inbox. And if I open it in the Unread folder it will immediately disapear after closing, where it goes I don't know. Have lost some important new email with this mystery problem. No response on this from Microsoft.

Hi an welcome to techspot. I found an article here that might help you. http://www.123together.com/Support/Recover_Disappearing_Emails_from_Inbox.htm