Exchange 2010 Security

We recently had a case where some Exchange 2010 mailboxes got deleted for no known reason by who knows who.  So we'd like to track such activity, perhaps log this activity.  What is the best way of going about this?  

Thank you!
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Ganesh Kumar ASr Infrastructure SpecialistCommented:
First Have you enabled Audit logging?

If you have enabled you can get using powershell.

Get-MailboxFolderStatistics "mailbox" -FolderScope RecoverableItems | ? {$_.Name -eq "Audits"} | Select identity,*items*

Search-MailboxAuditLog "mailbox" -LogonTypes Delegate -ShowDetails

Please refer step by step from :

Also there is a script file for getting the log in better format:
ejefferson213Author Commented:
Thanks for your comment.  This appears directed an individual mailbox auditing, however, I'm concerned with mailboxes that were deleted (not mail items).  What is the best way to track that activity?
Ganesh Kumar ASr Infrastructure SpecialistCommented:
The script which i have provided link does the audit for mailboxes. It might be useful, please check that.

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ejefferson213Author Commented:
Thank you very much; just what I was looking for!!!
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