About this article
This article was generated using an automated workflow powered by generative AI. It reviews current Microsoft Learn documentation on Communication Compliance and outlines safe implementation practices, including privacy and licensing considerations.Verification Status: 📘 Verified with official Microsoft documentation – Hands-on verification not performed
Microsoft Purview Communication Compliance is a framework for detecting and reviewing organization-defined risks—such as harassment, sensitive information, and inappropriate language—across communications in Teams, Exchange Online, Viva Engage, and other channels.
Designed with privacy in mind, not as a surveillance tool
Microsoft designed Communication Compliance with privacy by design, meaning user names are pseudonymized by default. Investigators are also governed through role-based access control, explicit designation of reviewers, and audit logs.
Policy ↓ 該当コミュニケーションを検出 ↓ Alert / Review ↓ 必要な調査 ↓ 教育・是正などの対応
Pay attention to licensing and consumption-based billing
Before use, verify the applicable Microsoft 365 subscriptions and ensure appropriate licenses are assigned to target users. For risk detection involving AI data outside of Microsoft 365, such as connected external AI applications, pay-as-you-go billing may be required in certain scenarios.
On the other hand, Microsoft Learn explains that detecting Microsoft 365 Copilot data within Microsoft 365 does not have the same pay-as-you-go requirements.
Define policy objectives before testing
Rather than immediately creating a broad monitoring policy, document the verification objectives.
目的 : 検証用Teamsで不適切表現の検出動作を確認 対象 : テストユーザーのみ Reviewer : 指定した検証担当者 保存する物 : 必要最小限の調査記録 期間 : 短期間
Focus areas
Define success as the ability to explain target users, reviewers, detection conditions, and data handling to third parties.
Change one setting at a time
Instead of expanding the scope, modify only a single detection condition and observe how false positives increase or decrease.
Auditing is a prerequisite
Communication Compliance uses audit logs to record alerts and reviewer remediation actions. While auditing is enabled by default in Microsoft 365, verify that it has not been disabled during deployment.
Key considerations for administrators
Role groups for Communication Compliance
Principle of least privilege for reviewers
Handling of pseudonymization
Target subscriptions and user licenses
Enabling auditing
Regional compliance for Azure dependencies
Pay-as-you-go billing for AI data outside Microsoft 365
Employment regulations, privacy, and labor-management procedures
Official Microsoft Information
Get started with Communication Compliance: https://learn.microsoft.com/en-us/purview/communication-compliance-configure
Communication Compliance overview: https://learn.microsoft.com/en-us/purview/communication-compliance
Purview service description: https://learn.microsoft.com/en-us/office365/servicedescriptions/microsoft-365-service-descriptions/microsoft-365-tenantlevel-services-licensing-guidance/microsoft-purview-service-description
When using Communication Compliance, it is important to focus not only on detection accuracy, but also on clearly defining who is being reviewed, for what purpose, and who will conduct the review.
