security policy

The security policy tag brings together practical discussions about managing Microsoft 365 collaboration and data protection controls. Coverage includes the Microsoft Teams External Domain Anomalies report, with guidance on evaluating unusual first-time contacts and deciding whether to keep a domain open, add it to a named allowlist, or block it after investigation. It also follows Microsoft Purview Endpoint Data Loss Prevention changes, including a planned file-extension picker intended to make policy authoring more consistent than free-form entry. These topics emphasize careful interpretation of security signals, administrative decision-making, and the operational details that affect how Microsoft security policies are configured and maintained.