Microsoft Outlook is deemed as a most proficient email client application which provides diverse handy functionalities with very ease. It is really very true that in the beginning of MS Office Outlook works very well but as years roll or time passed it may get sluggish. Because overtimes, MS Outlook data files that is PST file memory space get filled with various attachments, emails, contacts, sent or received messages, reminders, drafts, journals, to-do-list, notes and other important elements. In such a situations, most of the MS Outlook users go for achieving Outlook PST data or file. When MS Outlook proceed to achieve PST files with improper steps, it may possible that some of the personal folders may get disappeared. Inaccurate method of un-archieving PST file contents may leads to missing of Outlook folders and cause folder disappears.