problem: When attempting to delete messages from an IMAP account in Outlook you receive \"The operation cannot be performed because the object has been deleted.\"
solution:
In Outlook:
FILE - Account Settings - Account Settings - Change - More Settings - Advanced Where it says Folders - Root folder path: Enter: inbox
FILE - Account Settings - Account Settings - Change - More Settings - Advanced
Where it says Folders - Root folder path:
Enter: inbox
Source: http://social.technet.microsoft.com/Forums/office/en-US/e5cf9882-82e9-4710-832f-186c38941558/imap-problem-with-outlook-2013-since-actual-patchday?forum=outlook