In Outlook how do I search for emails sent from a specific person when looking in the sent folder

Good morning Experts,
I am using Outlook 2013.  In my setup, I don't only view my personal emails, but also those of a the Sales Person that I have been assigned to.
I want to search and filter the Sent folder so that it shows only emails that the Sales Person has sent out (Exclude the emails I have sent out).  How can I do this?

Thanks in advance,
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Mohammed KhawajaManager - Infrastructure:  Information TechnologyCommented:
Use the following searches in the Outlook search box:


If you want to find an email you sent to someone with an attachment:

to:xxxx hasattachment:yes

To search between dates:

received:4/1/2014 .. 4/30/2015

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