The Exchange server priv.edb and priv.stm databases stores all important users data like contacts, emails, notes, tasks, folders, journals, media files, attachments and others in their individual mailboxes. When a user tries defragment the database file of Exchange Server manually, an error message may appear on the user's screen:
"Operation terminated with error -2231 (JET_errSLVStreamingFileInUse, The specified streaming file is currently in use) after 0.891 seconds."
