Microsoft Purview: Data Loss Prevention (DLP) & Sensitivity Labels
Classifying and cryptographically protecting sensitive customer data, financial records, and intellectual property across M365.
From Perimeter Defense to Data-Centric Security
Perimeter controls cannot protect data once it is legitimately downloaded or shared. Microsoft Purview sensitivity labels embed encryption and rights-management directly into Office documents and PDFs, ensuring protection travels with the file regardless of destination.
Configuring Tiered Classification Taxonomy
Enterprises should deploy a clear four-tier classification model: Public, General Business, Confidential, and Highly Restricted. Highly Restricted labels enforce automatic AES-256 encryption, prohibiting unauthorized forwarding, copying, or printing outside authorized user groups.
Preventing Accidental Exfiltration via DLP Rules
Purview DLP policies inspect outbound emails, Teams chats, and OneDrive sharing links for credit card numbers, national identification numbers, and IBAN records. Violations trigger real-time policy tips to educate users while blocking external transmission.
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