a new Mac user, using outlook 2011 for mac, and a MS Exchange account.

Over the past 4 weeks, I have moved most of my incoming emails from my inbox to folders imported from my multiple pst on "my computer" (as i used to do with my PC). My outlook crashed this morning and I tried to recover my emails using Microsoft Database Utility.  After 4 unsuccessful attempts, I have opted to create a new identity, and to rebuild my inbox. When i imported again my psts "on my computer", I realised that ALL the emails i moved were missing (in outlook, finder, etc). 

Are those moved emails permanently lost ? how can i retrieve them ? 

Thank you for helping me to save 1 month of hard work !!!

Patrice