How to recover lost emails from exchange server for outlook ost file

Some emails were lost from inbox and outbox, our mail server is MS Exchange and our client is Outlook 2010 with OST file.

Can someone give me a solution or recommend a tool to do this recover?
sergiohugoAsked:
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Will SzymkowskiSenior Solution ArchitectCommented:
If the emails were actually DELETED, then you can use "Recoever Deleted Items" within Outlook. The default retension for this 14 days. If the emails where not deleted and they were moved then i would recommend that you search all mail folders within the mailbox.

If all else fails you might have to recover from backup.

Will.
JohnBusiness Consultant (Owner)Commented:
If you think the emails are in or may be in the OST file, try Stellar Tools to convert the OST to PST and recover from that.

http://www.stellarinfo.com/gdc/exchange-ost-recovery.php?gclid=COqS4eKZ98UCFQiBaQodcYgAhQ

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JohnBusiness Consultant (Owner)Commented:
@sergiohugo  - Thanks and I was happy to help.
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