HUIT has implemented TAP Attachment Defense from Proofpoint on our Office 365 email system. The TAP system detects an email that contains a malicious attachment and strips the attachment to prevent phishing and targeted malware attacks. If you receive an email containing an infected attachment, Proofpoint will filter out the email to protect your account from being compromised. If you know who sent the stripped attachment, let the sender know that a malicious attachment has been propagated from their email address. Do not accept any shared files from that sender until you confirm that they have worked with their IT support and run security and virus scans on their devices.