App Compliance Automation Tool for Microsoft 365 (ACAT) is a service in Azure Portal that helps simplify the compliance journey for any app that consumes Microsoft 365 customer data and is published via Partner Center. With this tool, you'll quickly be able to define the compliance boundary for your applications, monitor the compliance results automatically, and complete the compliance audit more easily. The compliance boundary is the cloud infrastructure that supports delivery of the app and any backend systems that the app may be communicating with.

In addition to providing a faster track towards Microsoft 365 certification, ACAT can help you in various compliance scenarios for Microsoft 365 applications:

• Detailed view and remediation steps for Microsoft 365 certification responsibilities.
• Automatic daily reports to help you get compliance results continuously.
• Security and compliance best practices that can be used as guidance in the early phase of your application lifecycle.