How to search all mailboxes Exchange 2013 for email address

I need to search all mailboxes to see if someone has sent or received an email from a particular external email address.
I tried this, but it didn't work:

Get-Mailbox | Search-Mailbox -SearchQuery '' -TargetMailbox "testmailbox" -TargetFolder "test" -LogLevel Full
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Peter HutchisonSenior Network Systems SpecialistCommented:
Try searching the Message Tracking logs, which record all incoming or outgoing messages,  instead e.g.

Get-MessageTrackingLog -Recipients

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AmitIT ArchitectCommented:
Run like this:

Get-mailboxserver -identity servername | search-mailbox -searchquery "" -targetmailbox testmailbox -TargetFolder "test" -loglevel full
Will SzymkowskiSenior Solution ArchitectCommented:
Message Tracking would be the most accurate way to track this down. If you use Search Mailbox this only searches the items that are actually in the mailbox itself. If the items do not exist due to deleted by the user or a rule then you results will come back with nothing. Message tracking will show all users that received the email regardless if it is still in their mailbox.

So Peter's command should suffice.

AmitIT ArchitectCommented:
I agree to Will. Also, if you still want to use that command. Pipe this
get-mailbox -server exchangeservername -resultsize unlimited
Minecraft_ EndermanCommented:
Search all messages sent to a particular external email address

Get-Mailbox | Search-Mailbox –SearchQuery “” -TargetMailbox "testmailbox" -TargetFolder "test" -LogLevel Full

Search all messages received from a particular external email address

Get-Mailbox | Search-Mailbox –SearchQuery “” -TargetMailbox "testmailbox" -TargetFolder "test" -LogLevel Full

Advanced Query Syntax in exchange search:
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