Cloud App Security

Cloud App Security (CAS), formally named Microsoft CAS, is a Microsoft-hosted service that is part of the Enterprise Mobility + Security (EMS) and Microsoft 365 suites of hosted services. It is designed to help customers discover how third-party cloud applications are being used by employees within the business, and potentially control cloud application usage in certain scenarios.

A reduced functionality tier of CAS, Office 365 CAS, is available with premium-tier subscriptions to Office 365.

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