Life will be easy now…

Microsoft has released Microsoft Exchange PST Capture.
Microsoft Exchange PST Capture is used to discover and import .pst files into Exchange Server or Exchange Online

Download  Microsoft Exchange PST Capture
http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=28767

Documentation:
http://technet.microsoft.com/en-us/library/hh781036.aspx

Cheers,