This phishing email features a sender that appears to be the same as the recipient, when it was instead "Received: from transwood.us.com.", found by checking the full header details.
From: HR@brown.edu <firstname.lastname@example.org>
Date: Thu, Oct 14, 2021 at 1:21 PM
Subject: HR@brown.edu mentioned you in the document "brown/bonus payments disclosure.docx".
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[brown/bonus payments disclosure.docx
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HR@brown.edu mentioned you
Why am I receiving this notification from Office?