Hi,
Currently we having Exchange Server 2013 and Outlook 2013 . when we use the options "Use Cached Exchange Mode " in account setting, we trying to search email under Shared mailbox with Current Folder Options Selected and it will not display recent email but old email . but when we untick Use Cached Exchange Mode in account Setting, we can search email with no issue. FYI, Our indexing is done. we have already tried to rebuild the index but the issue will happend after few weeks.