Microsoft Purview compliance portal
Communication Compliance - Ability to set a retention period for a policy

Introducing the ability to define how long content captured by a Communication Compliance policy is retained. Microsoft Purview Communication Compliance provides the tools to help organizations detect regulatory compliance violations (e.g. SEC or FINRA), such as sensitive or confidential information, harassing or threatening language, and sharing of adult content. Built with privacy by design, usernames are pseudonymized by default, role-based access controls are built in, investigators are opted in by an admin, and audit logs are in place to help ensure user-level privacy.